- i ({{MathWorld | urlname=i | title=i}}): I
- I ({{MathWorld | urlname=I | title=I}}): I
- I-Signature ({{MathWorld | urlname=I-Signature | title=I-Signature}}): I-signature
- Iamond ({{MathWorld | urlname=Iamond | title=Iamond}}): Iamond
- Iban Number ({{MathWorld | urlname=IbanNumber | title=Iban Number}}): Iban number
- Ice Fractal ({{MathWorld | urlname=IceFractal | title=Ice Fractal}}): Ice fractal
- Icosagon ({{MathWorld | urlname=Icosagon | title=Icosagon}}): Icosagon
- Icosahedral Equation ({{MathWorld | urlname=IcosahedralEquation | title=Icosahedral Equation}}): Icosahedral equation
- Icosahedral Graph ({{MathWorld | urlname=IcosahedralGraph | title=Icosahedral Graph}}): Icosahedral graph
- Icosahedral Group ({{MathWorld | urlname=IcosahedralGroup | title=Icosahedral Group}}): Icosahedral group
- Icosahedron ({{MathWorld | urlname=Icosahedron | title=Icosahedron}}): Icosahedron
- Icosahedron 2-Compound ({{MathWorld | urlname=Icosahedron2-Compound | title=Icosahedron 2-Compound}}): Icosahedron 2-compound
- Icosahedron 5-Compound ({{MathWorld | urlname=Icosahedron5-Compound | title=Icosahedron 5-Compound}}): Icosahedron 5-compound
- Icosahedron 6-Compound ({{MathWorld | urlname=Icosahedron6-Compound | title=Icosahedron 6-Compound}}): Icosahedron 6-compound
- Icosahedron Stellations ({{MathWorld | urlname=IcosahedronStellations | title=Icosahedron Stellations}}): Icosahedron stellations
- Icosian Game ({{MathWorld | urlname=IcosianGame | title=Icosian Game}}): Icosian game
- Icosidodecadodecahedron ({{MathWorld | urlname=Icosidodecadodecahedron | title=Icosidodecadodecahedron}}): Icosidodecadodecahedron
- Icosidodecagon ({{MathWorld | urlname=Icosidodecagon | title=Icosidodecagon}}): Icosidodecagon
- Icosidodecahedral Graph ({{MathWorld | urlname=IcosidodecahedralGraph | title=Icosidodecahedral Graph}}): Icosidodecahedral graph
- Icosidodecahedron ({{MathWorld | urlname=Icosidodecahedron | title=Icosidodecahedron}}): Icosidodecahedron
- Icosidodecahedron Stellation ({{MathWorld | urlname=IcosidodecahedronStellation | title=Icosidodecahedron Stellation}}): Icosidodecahedron stellation
- Icosidodecahedron-Rhombic Triacontahedron Compound ({{MathWorld | urlname=Icosidodecahedron-RhombicTriacontahedronCompound | title=Icosidodecahedron-Rhombic Triacontahedron Compound}}): Icosidodecahedron-rhombic triacontahedron compound
- Icosidodecatruncated Icosidodecahedron ({{MathWorld | urlname=IcosidodecatruncatedIcosidodecahedron | title=Icosidodecatruncated Icosidodecahedron}}): Icosidodecatruncated icosidodecahedron
- Icositetrachoron ({{MathWorld | urlname=Icositetrachoron | title=Icositetrachoron}}): Icositetrachoron
- Icositetragon ({{MathWorld | urlname=Icositetragon | title=Icositetragon}}): Icositetragon
- Icositetrahedron ({{MathWorld | urlname=Icositetrahedron | title=Icositetrahedron}}): Icositetrahedron
- Icositruncated Dodecadodecahedron ({{MathWorld | urlname=IcositruncatedDodecadodecahedron | title=Icositruncated Dodecadodecahedron}}): Icositruncated dodecadodecahedron
- Idèle ({{MathWorld | urlname=Idele | title=Idèle}}): Idèle
- Ida Surface ({{MathWorld | urlname=IdaSurface | title=Ida Surface}}): Ida surface
- Ideal ({{MathWorld | urlname=Ideal | title=Ideal}}): Ideal
- Ideal Class ({{MathWorld | urlname=IdealClass | title=Ideal Class}}): Ideal class
- Ideal Contraction ({{MathWorld | urlname=IdealContraction | title=Ideal Contraction}}): Ideal contraction
- Ideal Extension ({{MathWorld | urlname=IdealExtension | title=Ideal Extension}}): Ideal extension
- Ideal Function ({{MathWorld | urlname=IdealFunction | title=Ideal Function}}): Ideal function
- Ideal Height ({{MathWorld | urlname=IdealHeight | title=Ideal Height}}): Ideal height
- Ideal Number ({{MathWorld | urlname=IdealNumber | title=Ideal Number}}): Ideal number
- Ideal Point ({{MathWorld | urlname=IdealPoint | title=Ideal Point}}): Ideal point
- Ideal Quotient ({{MathWorld | urlname=IdealQuotient | title=Ideal Quotient}}): Ideal quotient
- Ideal Radical ({{MathWorld | urlname=IdealRadical | title=Ideal Radical}}): Ideal radical
- Idemfactor ({{MathWorld | urlname=Idemfactor | title=Idemfactor}}): Idemfactor
- Idempotent ({{MathWorld | urlname=Idempotent | title=Idempotent}}): Idempotent
- Idempotent Matrix ({{MathWorld | urlname=IdempotentMatrix | title=Idempotent Matrix}}): Idempotent matrix
- Idempotent Number ({{MathWorld | urlname=IdempotentNumber | title=Idempotent Number}}): Idempotent number
- Idempotent Semigroup ({{MathWorld | urlname=IdempotentSemigroup | title=Idempotent Semigroup}}): Idempotent semigroup
- Identical Congruence ({{MathWorld | urlname=IdenticalCongruence | title=Identical Congruence}}): Identical congruence
- Identically Zero ({{MathWorld | urlname=IdenticallyZero | title=Identically Zero}}): Identically zero
- Identity ({{MathWorld | urlname=Identity | title=Identity}}): Identity
- Identity Element ({{MathWorld | urlname=IdentityElement | title=Identity Element}}): Identity element
- Identity Function ({{MathWorld | urlname=IdentityFunction | title=Identity Function}}): Identity function
- Identity Graph ({{MathWorld | urlname=IdentityGraph | title=Identity Graph}}): Identity graph
- Identity Group ({{MathWorld | urlname=IdentityGroup | title=Identity Group}}): Identity group
- Identity Map ({{MathWorld | urlname=IdentityMap | title=Identity Map}}): Identity map
- Identity Matrix ({{MathWorld | urlname=IdentityMatrix | title=Identity Matrix}}): Identity matrix
- Identity Operator ({{MathWorld | urlname=IdentityOperator | title=Identity Operator}}): Identity operator
- Identity Problem ({{MathWorld | urlname=IdentityProblem | title=Identity Problem}}): Identity problem
- Identity Transformation ({{MathWorld | urlname=IdentityTransformation | title=Identity Transformation}}): Identity transformation
- Identity Tree ({{MathWorld | urlname=IdentityTree | title=Identity Tree}}): Identity tree
- Identric Mean ({{MathWorld | urlname=IdentricMean | title=Identric Mean}}): Identric mean
- Idoneal Number ({{MathWorld | urlname=IdonealNumber | title=Idoneal Number}}): Idoneal number
- Iff ({{MathWorld | urlname=Iff | title=Iff}}): Iff
- Ill-Conditioned Matrix ({{MathWorld | urlname=Ill-ConditionedMatrix | title=Ill-Conditioned Matrix}}): Ill-conditioned matrix
- Ill-Defined ({{MathWorld | urlname=Ill-Defined | title=Ill-Defined}}): Ill-defined
- Illumination Problem ({{MathWorld | urlname=IlluminationProblem | title=Illumination Problem}}): Illumination problem
- Illusion ({{MathWorld | urlname=Illusion | title=Illusion}}): Illusion
- Illusory Contour Figures ({{MathWorld | urlname=IllusoryContourFigures | title=Illusory Contour Figures}}): Illusory contour figures
- Im ({{MathWorld | urlname=Im | title=Im}}): Im
- Image ({{MathWorld | urlname=Image | title=Image}}): Image
- Imaginary Axis ({{MathWorld | urlname=ImaginaryAxis | title=Imaginary Axis}}): Imaginary axis
- Imaginary Circle ({{MathWorld | urlname=ImaginaryCircle | title=Imaginary Circle}}): Imaginary circle
- Imaginary Identity ({{MathWorld | urlname=ImaginaryIdentity | title=Imaginary Identity}}): Imaginary identity
- Imaginary Line ({{MathWorld | urlname=ImaginaryLine | title=Imaginary Line}}): Imaginary line
- Imaginary Number ({{MathWorld | urlname=ImaginaryNumber | title=Imaginary Number}}): Imaginary number
- Imaginary Part ({{MathWorld | urlname=ImaginaryPart | title=Imaginary Part}}): Imaginary part
- Imaginary Point ({{MathWorld | urlname=ImaginaryPoint | title=Imaginary Point}}): Imaginary point
- Imaginary Quadratic Field ({{MathWorld | urlname=ImaginaryQuadraticField | title=Imaginary Quadratic Field}}): Imaginary quadratic field
- Imaginary Unit ({{MathWorld | urlname=ImaginaryUnit | title=Imaginary Unit}}): Imaginary unit
- Immanant ({{MathWorld | urlname=Immanant | title=Immanant}}): Immanant
- Immersed Minimal Surface ({{MathWorld | urlname=ImmersedMinimalSurface | title=Immersed Minimal Surface}}): Immersed minimal surface
- Immersion ({{MathWorld | urlname=Immersion | title=Immersion}}): Immersion
- Immersion Theorem ({{MathWorld | urlname=ImmersionTheorem | title=Immersion Theorem}}): Immersion theorem
- Impartial Game ({{MathWorld | urlname=ImpartialGame | title=Impartial Game}}): Impartial game
- Implication ({{MathWorld | urlname=Implication | title=Implication}}): Implication
- Implicit Differentiation ({{MathWorld | urlname=ImplicitDifferentiation | title=Implicit Differentiation}}): Implicit differentiation
- Implicit Equation ({{MathWorld | urlname=ImplicitEquation | title=Implicit Equation}}): Implicit equation
- Implicit Function ({{MathWorld | urlname=ImplicitFunction | title=Implicit Function}}): Implicit function
- Implicit Function Theorem ({{MathWorld | urlname=ImplicitFunctionTheorem | title=Implicit Function Theorem}}): Implicit function theorem
- Implies ({{MathWorld | urlname=Implies | title=Implies}}): Implies
- Impossible Box ({{MathWorld | urlname=ImpossibleBox | title=Impossible Box}}): Impossible box
- Impossible Figure ({{MathWorld | urlname=ImpossibleFigure | title=Impossible Figure}}): Impossible figure
- Impossible Fork ({{MathWorld | urlname=ImpossibleFork | title=Impossible Fork}}): Impossible fork
- Impossible Joinery ({{MathWorld | urlname=ImpossibleJoinery | title=Impossible Joinery}}): Impossible joinery
- Impossible Torus ({{MathWorld | urlname=ImpossibleTorus | title=Impossible Torus}}): Impossible torus
- Impossible Triangle ({{MathWorld | urlname=ImpossibleTriangle | title=Impossible Triangle}}): Impossible triangle
- Impossible Tribar ({{MathWorld | urlname=ImpossibleTribar | title=Impossible Tribar}}): Impossible tribar
- Impredicative ({{MathWorld | urlname=Impredicative | title=Impredicative}}): Impredicative
- Improper Divisor ({{MathWorld | urlname=ImproperDivisor | title=Improper Divisor}}): Improper divisor
- Improper Fraction ({{MathWorld | urlname=ImproperFraction | title=Improper Fraction}}): Improper fraction
- Improper Integral ({{MathWorld | urlname=ImproperIntegral | title=Improper Integral}}): Improper integral
- Improper Node ({{MathWorld | urlname=ImproperNode | title=Improper Node}}): Improper node
- Improper Rotation ({{MathWorld | urlname=ImproperRotation | title=Improper Rotation}}): Improper rotation
- Improper Subset ({{MathWorld | urlname=ImproperSubset | title=Improper Subset}}): Improper subset
- Impulse Pair ({{MathWorld | urlname=ImpulsePair | title=Impulse Pair}}): Impulse pair
- Impulse Symbol ({{MathWorld | urlname=ImpulseSymbol | title=Impulse Symbol}}): Impulse symbol
- In-and-Out Curve ({{MathWorld | urlname=In-and-OutCurve | title=In-and-Out Curve}}): In-and-out curve
- In-Shuffle ({{MathWorld | urlname=In-Shuffle | title=In-Shuffle}}): In-shuffle
- Inaccessible Cardinal ({{MathWorld | urlname=InaccessibleCardinal | title=Inaccessible Cardinal}}): Inaccessible cardinal
- Inaccessible Cardinals Axiom ({{MathWorld | urlname=InaccessibleCardinalsAxiom | title=Inaccessible Cardinals Axiom}}): Inaccessible cardinals axiom
- Inadmissible ({{MathWorld | urlname=Inadmissible | title=Inadmissible}}): Inadmissible
- Incenter ({{MathWorld | urlname=Incenter | title=Incenter}}): Incenter
- Incenter-Excenter Circle ({{MathWorld | urlname=Incenter-ExcenterCircle | title=Incenter-Excenter Circle}}): Incenter-excenter circle
- Incentral Circle ({{MathWorld | urlname=IncentralCircle | title=Incentral Circle}}): Incentral circle
- Incentral Triangle ({{MathWorld | urlname=IncentralTriangle | title=Incentral Triangle}}): Incentral triangle
- Incidence Axioms ({{MathWorld | urlname=IncidenceAxioms | title=Incidence Axioms}}): Incidence axioms
- Incidence Graph ({{MathWorld | urlname=IncidenceGraph | title=Incidence Graph}}): Incidence graph
- Incidence Matrix ({{MathWorld | urlname=IncidenceMatrix | title=Incidence Matrix}}): Incidence matrix
- Incident ({{MathWorld | urlname=Incident | title=Incident}}): Incident
- Incircle ({{MathWorld | urlname=Incircle | title=Incircle}}): Incircle
- Inclusion Map ({{MathWorld | urlname=InclusionMap | title=Inclusion Map}}): Inclusion map
- Inclusion-Exclusion Principle ({{MathWorld | urlname=Inclusion-ExclusionPrinciple | title=Inclusion-Exclusion Principle}}): Inclusion-exclusion principle
- Inclusive Disjunction ({{MathWorld | urlname=InclusiveDisjunction | title=Inclusive Disjunction}}): Inclusive disjunction
- Incommensurate ({{MathWorld | urlname=Incommensurate | title=Incommensurate}}): Incommensurate
- Incomparable Rectangles ({{MathWorld | urlname=IncomparableRectangles | title=Incomparable Rectangles}}): Incomparable rectangles
- Incomplete Beta Function ({{MathWorld | urlname=IncompleteBetaFunction | title=Incomplete Beta Function}}): Incomplete beta function
- Incomplete Elliptic Integral ({{MathWorld | urlname=IncompleteEllipticIntegral | title=Incomplete Elliptic Integral}}): Incomplete elliptic integral
- Incomplete Elliptic Integral of the First Kind ({{MathWorld | urlname=IncompleteEllipticIntegraloftheFirstKind | title=Incomplete Elliptic Integral of the First Kind}}): Incomplete elliptic integral of the first kind
- Incomplete Elliptic Integral of the Second Kind ({{MathWorld | urlname=IncompleteEllipticIntegraloftheSecondKind | title=Incomplete Elliptic Integral of the Second Kind}}): Incomplete elliptic integral of the second kind
- Incomplete Elliptic Integral of the Third Kind ({{MathWorld | urlname=IncompleteEllipticIntegraloftheThirdKind | title=Incomplete Elliptic Integral of the Third Kind}}): Incomplete elliptic integral of the third kind
- Incomplete Gamma Function ({{MathWorld | urlname=IncompleteGammaFunction | title=Incomplete Gamma Function}}): Incomplete gamma function
- Incompleteness ({{MathWorld | urlname=Incompleteness | title=Incompleteness}}): Incompleteness
- Inconic ({{MathWorld | urlname=Inconic | title=Inconic}}): Inconic
- Increasing Function ({{MathWorld | urlname=IncreasingFunction | title=Increasing Function}}): Increasing function
- Increasing Sequence ({{MathWorld | urlname=IncreasingSequence | title=Increasing Sequence}}): Increasing sequence
- Indecomposable ({{MathWorld | urlname=Indecomposable | title=Indecomposable}}): Indecomposable
- Indecomposable Continuum ({{MathWorld | urlname=IndecomposableContinuum | title=Indecomposable Continuum}}): Indecomposable continuum
- Indecomposable Module ({{MathWorld | urlname=IndecomposableModule | title=Indecomposable Module}}): Indecomposable module
- Indefinite Integral ({{MathWorld | urlname=IndefiniteIntegral | title=Indefinite Integral}}): Indefinite integral
- Indefinite Matrix ({{MathWorld | urlname=IndefiniteMatrix | title=Indefinite Matrix}}): Indefinite matrix
- Indefinite Quadratic Form ({{MathWorld | urlname=IndefiniteQuadraticForm | title=Indefinite Quadratic Form}}): Indefinite quadratic form
- Indefinite Summation Operator ({{MathWorld | urlname=IndefiniteSummationOperator | title=Indefinite Summation Operator}}): Indefinite summation operator
- Indegree ({{MathWorld | urlname=Indegree | title=Indegree}}): Indegree
- Independence Axiom ({{MathWorld | urlname=IndependenceAxiom | title=Independence Axiom}}): Independence axiom
- Independence Complement Theorem ({{MathWorld | urlname=IndependenceComplementTheorem | title=Independence Complement Theorem}}): Independence complement theorem
- Independence Number ({{MathWorld | urlname=IndependenceNumber | title=Independence Number}}): Independence number
- Independent Equations ({{MathWorld | urlname=IndependentEquations | title=Independent Equations}}): Independent equations
- Independent Events ({{MathWorld | urlname=IndependentEvents | title=Independent Events}}): Independent events
- Independent Sequence ({{MathWorld | urlname=IndependentSequence | title=Independent Sequence}}): Independent sequence
- Independent Set ({{MathWorld | urlname=IndependentSet | title=Independent Set}}): Independent set
- Independent Statistics ({{MathWorld | urlname=IndependentStatistics | title=Independent Statistics}}): Independent statistics
- Independent Vertices ({{MathWorld | urlname=IndependentVertices | title=Independent Vertices}}): Independent vertices
- Indeterminate ({{MathWorld | urlname=Indeterminate | title=Indeterminate}}): Indeterminate
- Indeterminate Equation ({{MathWorld | urlname=IndeterminateEquation | title=Indeterminate Equation}}): Indeterminate equation
- Indeterminate Problem ({{MathWorld | urlname=IndeterminateProblem | title=Indeterminate Problem}}): Indeterminate problem
- Index ({{MathWorld | urlname=Index | title=Index}}): Index
- Index Gymnastics ({{MathWorld | urlname=IndexGymnastics | title=Index Gymnastics}}): Index gymnastics
- Index Law ({{MathWorld | urlname=IndexLaw | title=Index Law}}): Index law
- Index Lowering ({{MathWorld | urlname=IndexLowering | title=Index Lowering}}): Index lowering
- Index Number ({{MathWorld | urlname=IndexNumber | title=Index Number}}): Index number
- Index Raising ({{MathWorld | urlname=IndexRaising | title=Index Raising}}): Index raising
- Index Set ({{MathWorld | urlname=IndexSet | title=Index Set}}): Index set
- Index Theory ({{MathWorld | urlname=IndexTheory | title=Index Theory}}): Index theory
- Indicator ({{MathWorld | urlname=Indicator | title=Indicator}}): Indicator
- Indicatrix ({{MathWorld | urlname=Indicatrix | title=Indicatrix}}): Indicatrix
- Indicial Equation ({{MathWorld | urlname=IndicialEquation | title=Indicial Equation}}): Indicial equation
- Indifference Principle ({{MathWorld | urlname=IndifferencePrinciple | title=Indifference Principle}}): Indifference principle
- Indirectly Conformal Mapping ({{MathWorld | urlname=IndirectlyConformalMapping | title=Indirectly Conformal Mapping}}): Indirectly conformal mapping
- Indiscrete Topology ({{MathWorld | urlname=IndiscreteTopology | title=Indiscrete Topology}}): Indiscrete topology
- Individual ({{MathWorld | urlname=Individual | title=Individual}}): Individual
- Induced Map ({{MathWorld | urlname=InducedMap | title=Induced Map}}): Induced map
- Induced Norm ({{MathWorld | urlname=InducedNorm | title=Induced Norm}}): Induced norm
- Induced Representation ({{MathWorld | urlname=InducedRepresentation | title=Induced Representation}}): Induced representation
- Induced Subgraph ({{MathWorld | urlname=InducedSubgraph | title=Induced Subgraph}}): Induced subgraph
- Induction ({{MathWorld | urlname=Induction | title=Induction}}): Induction
- Induction Axiom ({{MathWorld | urlname=InductionAxiom | title=Induction Axiom}}): Induction axiom
- Inductive Bias ({{MathWorld | urlname=InductiveBias | title=Inductive Bias}}): Inductive bias
- Inductive Set ({{MathWorld | urlname=InductiveSet | title=Inductive Set}}): Inductive set
- Inellipse ({{MathWorld | urlname=Inellipse | title=Inellipse}}): Inellipse
- Inequality ({{MathWorld | urlname=Inequality | title=Inequality}}): Inequality
- Inequation ({{MathWorld | urlname=Inequation | title=Inequation}}): Inequation
- Inexact Differential ({{MathWorld | urlname=InexactDifferential | title=Inexact Differential}}): Inexact differential
- Inf ({{MathWorld | urlname=Inf | title=Inf}}): Inf
- Inferior Point ({{MathWorld | urlname=InferiorPoint | title=Inferior Point}}): Inferior point
- Infimum ({{MathWorld | urlname=Infimum | title=Infimum}}): Infimum
- Infimum Limit ({{MathWorld | urlname=InfimumLimit | title=Infimum Limit}}): Infimum limit
- Infinitary Divisor ({{MathWorld | urlname=InfinitaryDivisor | title=Infinitary Divisor}}): Infinitary divisor
- Infinitary Multiperfect Number ({{MathWorld | urlname=InfinitaryMultiperfectNumber | title=Infinitary Multiperfect Number}}): Infinitary multiperfect number
- Infinitary Perfect Number ({{MathWorld | urlname=InfinitaryPerfectNumber | title=Infinitary Perfect Number}}): Infinitary perfect number
- Infinite ({{MathWorld | urlname=Infinite | title=Infinite}}): Infinite
- Infinite Cosine Product Integral ({{MathWorld | urlname=InfiniteCosineProductIntegral | title=Infinite Cosine Product Integral}}): Infinite cosine product integral
- Infinite Graph ({{MathWorld | urlname=InfiniteGraph | title=Infinite Graph}}): Infinite graph
- Infinite Group ({{MathWorld | urlname=InfiniteGroup | title=Infinite Group}}): Infinite group
- Infinite Matrix ({{MathWorld | urlname=InfiniteMatrix | title=Infinite Matrix}}): Infinite matrix
- Infinite Product ({{MathWorld | urlname=InfiniteProduct | title=Infinite Product}}): Infinite product
- Infinite Series ({{MathWorld | urlname=InfiniteSeries | title=Infinite Series}}): Infinite series
- Infinite Set ({{MathWorld | urlname=InfiniteSet | title=Infinite Set}}): Infinite set
- Infinitesimal ({{MathWorld | urlname=Infinitesimal | title=Infinitesimal}}): Infinitesimal
- Infinitesimal Analysis ({{MathWorld | urlname=InfinitesimalAnalysis | title=Infinitesimal Analysis}}): Infinitesimal analysis
- Infinitesimal Calculus ({{MathWorld | urlname=InfinitesimalCalculus | title=Infinitesimal Calculus}}): Infinitesimal calculus
- Infinitesimal Matrix Change ({{MathWorld | urlname=InfinitesimalMatrixChange | title=Infinitesimal Matrix Change}}): Infinitesimal matrix change
- Infinitesimal Rotation ({{MathWorld | urlname=InfinitesimalRotation | title=Infinitesimal Rotation}}): Infinitesimal rotation
- Infinitive Sequence ({{MathWorld | urlname=InfinitiveSequence | title=Infinitive Sequence}}): Infinitive sequence
- Infinitude of Primes ({{MathWorld | urlname=InfinitudeofPrimes | title=Infinitude of Primes}}): Infinitude of primes
- Infinity ({{MathWorld | urlname=Infinity | title=Infinity}}): Infinity
- Inflection Point ({{MathWorld | urlname=InflectionPoint | title=Inflection Point}}): Inflection point
- Information Dimension ({{MathWorld | urlname=InformationDimension | title=Information Dimension}}): Information dimension
- Information Entropy ({{MathWorld | urlname=InformationEntropy | title=Information Entropy}}): Information entropy
- Information Theory ({{MathWorld | urlname=InformationTheory | title=Information Theory}}): Information theory
- Inhomogeneous Linear Ordinary Differential Equation with Constant Coefficients ({{MathWorld | urlname=InhomogeneousLinearOrdinaryDifferentialEquationwithConstantCoefficients | title=Inhomogeneous Linear Ordinary Differential Equation with Constant Coefficients}}): Inhomogeneous linear ordinary differential equation with constant coefficients
- Initial Conditions ({{MathWorld | urlname=InitialConditions | title=Initial Conditions}}): Initial conditions
- Initial Object ({{MathWorld | urlname=InitialObject | title=Initial Object}}): Initial object
- Initial Ordinal ({{MathWorld | urlname=InitialOrdinal | title=Initial Ordinal}}): Initial ordinal
- Initial Segment ({{MathWorld | urlname=InitialSegment | title=Initial Segment}}): Initial segment
- Initial Value Problem ({{MathWorld | urlname=InitialValueProblem | title=Initial Value Problem}}): Initial value problem
- Injection ({{MathWorld | urlname=Injection | title=Injection}}): Injection
- Injective ({{MathWorld | urlname=Injective | title=Injective}}): Injective
- Injective Map ({{MathWorld | urlname=InjectiveMap | title=Injective Map}}): Injective map
- Injective Module ({{MathWorld | urlname=InjectiveModule | title=Injective Module}}): Injective module
- Injective Patch ({{MathWorld | urlname=InjectivePatch | title=Injective Patch}}): Injective patch
- Injectivity ({{MathWorld | urlname=Injectivity | title=Injectivity}}): Injectivity
- Inner Automorphism ({{MathWorld | urlname=InnerAutomorphism | title=Inner Automorphism}}): Inner automorphism
- Inner Automorphism Group ({{MathWorld | urlname=InnerAutomorphismGroup | title=Inner Automorphism Group}}): Inner automorphism group
- Inner Inscribed Squares Triangle ({{MathWorld | urlname=InnerInscribedSquaresTriangle | title=Inner Inscribed Squares Triangle}}): Inner inscribed squares triangle
- Inner Napoleon Circle ({{MathWorld | urlname=InnerNapoleonCircle | title=Inner Napoleon Circle}}): Inner napoleon circle
- Inner Napoleon Point ({{MathWorld | urlname=InnerNapoleonPoint | title=Inner Napoleon Point}}): Inner napoleon point
- Inner Napoleon Triangle ({{MathWorld | urlname=InnerNapoleonTriangle | title=Inner Napoleon Triangle}}): Inner napoleon triangle
- Inner Pentagon Point ({{MathWorld | urlname=InnerPentagonPoint | title=Inner Pentagon Point}}): Inner pentagon point
- Inner Product ({{MathWorld | urlname=InnerProduct | title=Inner Product}}): Inner product
- Inner Product Space ({{MathWorld | urlname=InnerProductSpace | title=Inner Product Space}}): Inner product space
- Inner Quermass ({{MathWorld | urlname=InnerQuermass | title=Inner Quermass}}): Inner quermass
- Inner Soddy Center ({{MathWorld | urlname=InnerSoddyCenter | title=Inner Soddy Center}}): Inner soddy center
- Inner Soddy Circle ({{MathWorld | urlname=InnerSoddyCircle | title=Inner Soddy Circle}}): Inner soddy circle
- Inner Vecten Circle ({{MathWorld | urlname=InnerVectenCircle | title=Inner Vecten Circle}}): Inner vecten circle
- Inner Vecten Point ({{MathWorld | urlname=InnerVectenPoint | title=Inner Vecten Point}}): Inner vecten point
- Inner Vecten Triangle ({{MathWorld | urlname=InnerVectenTriangle | title=Inner Vecten Triangle}}): Inner vecten triangle
- Inradius ({{MathWorld | urlname=Inradius | title=Inradius}}): Inradius
- Inscribed ({{MathWorld | urlname=Inscribed | title=Inscribed}}): Inscribed
- Inscribed Angle ({{MathWorld | urlname=InscribedAngle | title=Inscribed Angle}}): Inscribed angle
- Inscribed Triangle ({{MathWorld | urlname=InscribedTriangle | title=Inscribed Triangle}}): Inscribed triangle
- Inscriptable Quadrilateral ({{MathWorld | urlname=InscriptableQuadrilateral | title=Inscriptable Quadrilateral}}): Inscriptable quadrilateral
- Inside ({{MathWorld | urlname=Inside | title=Inside}}): Inside
- Inside-Outside Plot ({{MathWorld | urlname=Inside-OutsidePlot | title=Inside-Outside Plot}}): Inside-outside plot
- Inside-Outside Theorem ({{MathWorld | urlname=Inside-OutsideTheorem | title=Inside-Outside Theorem}}): Inside-outside theorem
- Insimilicenter ({{MathWorld | urlname=Insimilicenter | title=Insimilicenter}}): Insimilicenter
- Insphere ({{MathWorld | urlname=Insphere | title=Insphere}}): Insphere
- Instrument Function ({{MathWorld | urlname=InstrumentFunction | title=Instrument Function}}): Instrument function
- Int ({{MathWorld | urlname=Int | title=Int}}): Int
- Intangent ({{MathWorld | urlname=Intangent | title=Intangent}}): Intangent
- Intangents Circle ({{MathWorld | urlname=IntangentsCircle | title=Intangents Circle}}): Intangents circle
- Intangents Triangle ({{MathWorld | urlname=IntangentsTriangle | title=Intangents Triangle}}): Intangents triangle
- Integer ({{MathWorld | urlname=Integer | title=Integer}}): Integer
- Integer Array ({{MathWorld | urlname=IntegerArray | title=Integer Array}}): Integer array
- Integer Bowl ({{MathWorld | urlname=IntegerBowl | title=Integer Bowl}}): Integer bowl
- Integer Brick ({{MathWorld | urlname=IntegerBrick | title=Integer Brick}}): Integer brick
- Integer Complexity ({{MathWorld | urlname=IntegerComplexity | title=Integer Complexity}}): Integer complexity
- Integer Cuboid ({{MathWorld | urlname=IntegerCuboid | title=Integer Cuboid}}): Integer cuboid
- Integer Division ({{MathWorld | urlname=IntegerDivision | title=Integer Division}}): Integer division
- Integer Exponent ({{MathWorld | urlname=IntegerExponent | title=Integer Exponent}}): Integer exponent
- Integer Factorization ({{MathWorld | urlname=IntegerFactorization | title=Integer Factorization}}): Integer factorization
- Integer Function ({{MathWorld | urlname=IntegerFunction | title=Integer Function}}): Integer function
- Integer Lattice ({{MathWorld | urlname=IntegerLattice | title=Integer Lattice}}): Integer lattice
- Integer Matrix ({{MathWorld | urlname=IntegerMatrix | title=Integer Matrix}}): Integer matrix
- Integer Module ({{MathWorld | urlname=IntegerModule | title=Integer Module}}): Integer module
- Integer Part ({{MathWorld | urlname=IntegerPart | title=Integer Part}}): Integer part
- Integer Polynomial ({{MathWorld | urlname=IntegerPolynomial | title=Integer Polynomial}}): Integer polynomial
- Integer Programming ({{MathWorld | urlname=IntegerProgramming | title=Integer Programming}}): Integer programming
- Integer Relation ({{MathWorld | urlname=IntegerRelation | title=Integer Relation}}): Integer relation
- Integer Sequence ({{MathWorld | urlname=IntegerSequence | title=Integer Sequence}}): Integer sequence
- Integer Sequence Primes ({{MathWorld | urlname=IntegerSequencePrimes | title=Integer Sequence Primes}}): Integer sequence primes
- Integer Triangle ({{MathWorld | urlname=IntegerTriangle | title=Integer Triangle}}): Integer triangle
- Integer Value ({{MathWorld | urlname=IntegerValue | title=Integer Value}}): Integer value
- Integer-Matrix Form ({{MathWorld | urlname=Integer-MatrixForm | title=Integer-Matrix Form}}): Integer-matrix form
- Integer-Representing Polynomial ({{MathWorld | urlname=Integer-RepresentingPolynomial | title=Integer-Representing Polynomial}}): Integer-representing polynomial
- IntegerDigits ({{MathWorld | urlname=IntegerDigits | title=IntegerDigits}}): Integerdigits
- IntegerLength ({{MathWorld | urlname=IntegerLength | title=IntegerLength}}): Integerlength
- IntegerPartitions ({{MathWorld | urlname=IntegerPartitions | title=IntegerPartitions}}): Integerpartitions
- IntegerQ ({{MathWorld | urlname=IntegerQ | title=IntegerQ}}): Integerq
- Integers ({{MathWorld | urlname=Integers | title=Integers}}): Integers
- Integrable ({{MathWorld | urlname=Integrable | title=Integrable}}): Integrable
- Integrable Differential Ideal ({{MathWorld | urlname=IntegrableDifferentialIdeal | title=Integrable Differential Ideal}}): Integrable differential ideal
- Integral ({{MathWorld | urlname=Integral | title=Integral}}): Integral
- Integral Brick ({{MathWorld | urlname=IntegralBrick | title=Integral Brick}}): Integral brick
- Integral Calculus ({{MathWorld | urlname=IntegralCalculus | title=Integral Calculus}}): Integral calculus
- Integral Closure ({{MathWorld | urlname=IntegralClosure | title=Integral Closure}}): Integral closure
- Integral Cohomology Class ({{MathWorld | urlname=IntegralCohomologyClass | title=Integral Cohomology Class}}): Integral cohomology class
- Integral Cuboid ({{MathWorld | urlname=IntegralCuboid | title=Integral Cuboid}}): Integral cuboid
- Integral Current ({{MathWorld | urlname=IntegralCurrent | title=Integral Current}}): Integral current
- Integral Curvature ({{MathWorld | urlname=IntegralCurvature | title=Integral Curvature}}): Integral curvature
- Integral Curve ({{MathWorld | urlname=IntegralCurve | title=Integral Curve}}): Integral curve
- Integral Domain ({{MathWorld | urlname=IntegralDomain | title=Integral Domain}}): Integral domain
- Integral Drawing ({{MathWorld | urlname=IntegralDrawing | title=Integral Drawing}}): Integral drawing
- Integral Element ({{MathWorld | urlname=IntegralElement | title=Integral Element}}): Integral element
- Integral Equation ({{MathWorld | urlname=IntegralEquation | title=Integral Equation}}): Integral equation
- Integral Equation Neumann Series ({{MathWorld | urlname=IntegralEquationNeumannSeries | title=Integral Equation Neumann Series}}): Integral equation neumann series
- Integral Extension ({{MathWorld | urlname=IntegralExtension | title=Integral Extension}}): Integral extension
- Integral Function ({{MathWorld | urlname=IntegralFunction | title=Integral Function}}): Integral function
- Integral Geometry ({{MathWorld | urlname=IntegralGeometry | title=Integral Geometry}}): Integral geometry
- Integral Graph ({{MathWorld | urlname=IntegralGraph | title=Integral Graph}}): Integral graph
- Integral Homology Group ({{MathWorld | urlname=IntegralHomologyGroup | title=Integral Homology Group}}): Integral homology group
- Integral Kernel ({{MathWorld | urlname=IntegralKernel | title=Integral Kernel}}): Integral kernel
- Integral of Motion ({{MathWorld | urlname=IntegralofMotion | title=Integral of Motion}}): Integral of motion
- Integral Polyhedron ({{MathWorld | urlname=IntegralPolyhedron | title=Integral Polyhedron}}): Integral polyhedron
- Integral Polynomial ({{MathWorld | urlname=IntegralPolynomial | title=Integral Polynomial}}): Integral polynomial
- Integral Sign ({{MathWorld | urlname=IntegralSign | title=Integral Sign}}): Integral sign
- Integral Test ({{MathWorld | urlname=IntegralTest | title=Integral Test}}): Integral test
- Integral Transform ({{MathWorld | urlname=IntegralTransform | title=Integral Transform}}): Integral transform
- Integrally Closed ({{MathWorld | urlname=IntegrallyClosed | title=Integrally Closed}}): Integrally closed
- Integrand ({{MathWorld | urlname=Integrand | title=Integrand}}): Integrand
- Integrate ({{MathWorld | urlname=Integrate | title=Integrate}}): Integrate
- Integrating Factor ({{MathWorld | urlname=IntegratingFactor | title=Integrating Factor}}): Integrating factor
- Integration ({{MathWorld | urlname=Integration | title=Integration}}): Integration
- Integration by Parts ({{MathWorld | urlname=IntegrationbyParts | title=Integration by Parts}}): Integration by parts
- Integration Constant ({{MathWorld | urlname=IntegrationConstant | title=Integration Constant}}): Integration constant
- Integration Lattice ({{MathWorld | urlname=IntegrationLattice | title=Integration Lattice}}): Integration lattice
- Integration Problem ({{MathWorld | urlname=IntegrationProblem | title=Integration Problem}}): Integration problem
- Integration Theory ({{MathWorld | urlname=IntegrationTheory | title=Integration Theory}}): Integration theory
- Integration Under the Integral Sign ({{MathWorld | urlname=IntegrationUndertheIntegralSign | title=Integration Under the Integral Sign}}): Integration under the integral sign
- Integro-Differential Equation ({{MathWorld | urlname=Integro-DifferentialEquation | title=Integro-Differential Equation}}): Integro-differential equation
- Intension ({{MathWorld | urlname=Intension | title=Intension}}): Intension
- Interchange Graph ({{MathWorld | urlname=InterchangeGraph | title=Interchange Graph}}): Interchange graph
- Interest ({{MathWorld | urlname=Interest | title=Interest}}): Interest
- Interior ({{MathWorld | urlname=Interior | title=Interior}}): Interior
- Interior Angle ({{MathWorld | urlname=InteriorAngle | title=Interior Angle}}): Interior angle
- Interior Angle Bisector ({{MathWorld | urlname=InteriorAngleBisector | title=Interior Angle Bisector}}): Interior angle bisector
- Interior Point Method ({{MathWorld | urlname=InteriorPointMethod | title=Interior Point Method}}): Interior point method
- Interior Product ({{MathWorld | urlname=InteriorProduct | title=Interior Product}}): Interior product
- Intermediate Value Theorem ({{MathWorld | urlname=IntermediateValueTheorem | title=Intermediate Value Theorem}}): Intermediate value theorem
- Intermediate-Value Theorem ({{MathWorld | urlname=Intermediate-ValueTheorem | title=Intermediate-Value Theorem}}): Intermediate-value theorem
- Internal Angle Bisector ({{MathWorld | urlname=InternalAngleBisector | title=Internal Angle Bisector}}): Internal angle bisector
- Internal Bisectors Problem ({{MathWorld | urlname=InternalBisectorsProblem | title=Internal Bisectors Problem}}): Internal bisectors problem
- Internal Center of Similitude ({{MathWorld | urlname=InternalCenterofSimilitude | title=Internal Center of Similitude}}): Internal center of similitude
- Internal Contact ({{MathWorld | urlname=InternalContact | title=Internal Contact}}): Internal contact
- Internal Knot ({{MathWorld | urlname=InternalKnot | title=Internal Knot}}): Internal knot
- Internal Path Length ({{MathWorld | urlname=InternalPathLength | title=Internal Path Length}}): Internal path length
- Internal Similitude Center ({{MathWorld | urlname=InternalSimilitudeCenter | title=Internal Similitude Center}}): Internal similitude center
- Internally Extendable Homomorphism ({{MathWorld | urlname=InternallyExtendableHomomorphism | title=Internally Extendable Homomorphism}}): Internally extendable homomorphism
- Internally Tangent ({{MathWorld | urlname=InternallyTangent | title=Internally Tangent}}): Internally tangent
- InterpolatingPolynomial ({{MathWorld | urlname=InterpolatingPolynomial | title=InterpolatingPolynomial}}): Interpolatingpolynomial
- Interpolation ({{MathWorld | urlname=Interpolation | title=Interpolation}}): Interpolation
- Interpretation ({{MathWorld | urlname=Interpretation | title=Interpretation}}): Interpretation
- Interprime ({{MathWorld | urlname=Interprime | title=Interprime}}): Interprime
- Interquartile Range ({{MathWorld | urlname=InterquartileRange | title=Interquartile Range}}): Interquartile range
- Interradius ({{MathWorld | urlname=Interradius | title=Interradius}}): Interradius
- Intersecting Circles ({{MathWorld | urlname=IntersectingCircles | title=Intersecting Circles}}): Intersecting circles
- Intersecting Cylinders ({{MathWorld | urlname=IntersectingCylinders | title=Intersecting Cylinders}}): Intersecting cylinders
- Intersecting Lines ({{MathWorld | urlname=IntersectingLines | title=Intersecting Lines}}): Intersecting lines
- Intersecting Spheres ({{MathWorld | urlname=IntersectingSpheres | title=Intersecting Spheres}}): Intersecting spheres
- Intersection ({{MathWorld | urlname=Intersection | title=Intersection}}): Intersection
- Intersection Array ({{MathWorld | urlname=IntersectionArray | title=Intersection Array}}): Intersection array
- Intersection Detection ({{MathWorld | urlname=IntersectionDetection | title=Intersection Detection}}): Intersection detection
- Intersection Graph ({{MathWorld | urlname=IntersectionGraph | title=Intersection Graph}}): Intersection graph
- Intersection Number ({{MathWorld | urlname=IntersectionNumber | title=Intersection Number}}): Intersection number
- Interspersion ({{MathWorld | urlname=Interspersion | title=Interspersion}}): Interspersion
- Intersphere ({{MathWorld | urlname=Intersphere | title=Intersphere}}): Intersphere
- Interval ({{MathWorld | urlname=Interval | title=Interval}}): Interval
- Interval Arithmetic ({{MathWorld | urlname=IntervalArithmetic | title=Interval Arithmetic}}): Interval arithmetic
- Interval Bisection ({{MathWorld | urlname=IntervalBisection | title=Interval Bisection}}): Interval bisection
- Interval Graph ({{MathWorld | urlname=IntervalGraph | title=Interval Graph}}): Interval graph
- Interval Order ({{MathWorld | urlname=IntervalOrder | title=Interval Order}}): Interval order
- Intouch Triangle ({{MathWorld | urlname=IntouchTriangle | title=Intouch Triangle}}): Intouch triangle
- Intrinsic Curvature ({{MathWorld | urlname=IntrinsicCurvature | title=Intrinsic Curvature}}): Intrinsic curvature
- Intrinsic Equation ({{MathWorld | urlname=IntrinsicEquation | title=Intrinsic Equation}}): Intrinsic equation
- Intrinsic Tangent Space ({{MathWorld | urlname=IntrinsicTangentSpace | title=Intrinsic Tangent Space}}): Intrinsic tangent space
- Intrinsic Variety ({{MathWorld | urlname=IntrinsicVariety | title=Intrinsic Variety}}): Intrinsic variety
- Intrinsically Linked ({{MathWorld | urlname=IntrinsicallyLinked | title=Intrinsically Linked}}): Intrinsically linked
- Intuitionistic Logic ({{MathWorld | urlname=IntuitionisticLogic | title=Intuitionistic Logic}}): Intuitionistic logic
- Invaginatum ({{MathWorld | urlname=Invaginatum | title=Invaginatum}}): Invaginatum
- Invariable Point ({{MathWorld | urlname=InvariablePoint | title=Invariable Point}}): Invariable point
- Invariant ({{MathWorld | urlname=Invariant | title=Invariant}}): Invariant
- Invariant Density ({{MathWorld | urlname=InvariantDensity | title=Invariant Density}}): Invariant density
- Invariant Factor ({{MathWorld | urlname=InvariantFactor | title=Invariant Factor}}): Invariant factor
- Invariant Manifold ({{MathWorld | urlname=InvariantManifold | title=Invariant Manifold}}): Invariant manifold
- Invariant Point ({{MathWorld | urlname=InvariantPoint | title=Invariant Point}}): Invariant point
- Invariant Series ({{MathWorld | urlname=InvariantSeries | title=Invariant Series}}): Invariant series
- Invariant Subgroup ({{MathWorld | urlname=InvariantSubgroup | title=Invariant Subgroup}}): Invariant subgroup
- Inverse ({{MathWorld | urlname=Inverse | title=Inverse}}): Inverse
- Inverse Chi-Squared Distribution ({{MathWorld | urlname=InverseChi-SquaredDistribution | title=Inverse Chi-Squared Distribution}}): Inverse chi-squared distribution
- Inverse Circular Functions ({{MathWorld | urlname=InverseCircularFunctions | title=Inverse Circular Functions}}): Inverse circular functions
- Inverse Cosecant ({{MathWorld | urlname=InverseCosecant | title=Inverse Cosecant}}): Inverse cosecant
- Inverse Cosine ({{MathWorld | urlname=InverseCosine | title=Inverse Cosine}}): Inverse cosine
- Inverse Cotangent ({{MathWorld | urlname=InverseCotangent | title=Inverse Cotangent}}): Inverse cotangent
- Inverse Curve ({{MathWorld | urlname=InverseCurve | title=Inverse Curve}}): Inverse curve
- Inverse Elliptic Nome ({{MathWorld | urlname=InverseEllipticNome | title=Inverse Elliptic Nome}}): Inverse elliptic nome
- Inverse Erf ({{MathWorld | urlname=InverseErf | title=Inverse Erf}}): Inverse erf
- Inverse Erfc ({{MathWorld | urlname=InverseErfc | title=Inverse Erfc}}): Inverse erfc
- Inverse Filter ({{MathWorld | urlname=InverseFilter | title=Inverse Filter}}): Inverse filter
- Inverse Fourier Transform ({{MathWorld | urlname=InverseFourierTransform | title=Inverse Fourier Transform}}): Inverse fourier transform
- Inverse Function ({{MathWorld | urlname=InverseFunction | title=Inverse Function}}): Inverse function
- Inverse Function Integration ({{MathWorld | urlname=InverseFunctionIntegration | title=Inverse Function Integration}}): Inverse function integration
- Inverse Function Theorem ({{MathWorld | urlname=InverseFunctionTheorem | title=Inverse Function Theorem}}): Inverse function theorem
- Inverse Gaussian Distribution ({{MathWorld | urlname=InverseGaussianDistribution | title=Inverse Gaussian Distribution}}): Inverse gaussian distribution
- Inverse Gudermannian ({{MathWorld | urlname=InverseGudermannian | title=Inverse Gudermannian}}): Inverse gudermannian
- Inverse Gumbel Distribution ({{MathWorld | urlname=InverseGumbelDistribution | title=Inverse Gumbel Distribution}}): Inverse gumbel distribution
- Inverse Haversine ({{MathWorld | urlname=InverseHaversine | title=Inverse Haversine}}): Inverse haversine
- Inverse Hyperbolic Cosecant ({{MathWorld | urlname=InverseHyperbolicCosecant | title=Inverse Hyperbolic Cosecant}}): Inverse hyperbolic cosecant
- Inverse Hyperbolic Cosine ({{MathWorld | urlname=InverseHyperbolicCosine | title=Inverse Hyperbolic Cosine}}): Inverse hyperbolic cosine
- Inverse Hyperbolic Cotangent ({{MathWorld | urlname=InverseHyperbolicCotangent | title=Inverse Hyperbolic Cotangent}}): Inverse hyperbolic cotangent
- Inverse Hyperbolic Functions ({{MathWorld | urlname=InverseHyperbolicFunctions | title=Inverse Hyperbolic Functions}}): Inverse hyperbolic functions
- Inverse Hyperbolic Secant ({{MathWorld | urlname=InverseHyperbolicSecant | title=Inverse Hyperbolic Secant}}): Inverse hyperbolic secant
- Inverse Hyperbolic Sine ({{MathWorld | urlname=InverseHyperbolicSine | title=Inverse Hyperbolic Sine}}): Inverse hyperbolic sine
- Inverse Hyperbolic Tangent ({{MathWorld | urlname=InverseHyperbolicTangent | title=Inverse Hyperbolic Tangent}}): Inverse hyperbolic tangent
- Inverse Laplace Transform ({{MathWorld | urlname=InverseLaplaceTransform | title=Inverse Laplace Transform}}): Inverse laplace transform
- Inverse Limit ({{MathWorld | urlname=InverseLimit | title=Inverse Limit}}): Inverse limit
- Inverse Map ({{MathWorld | urlname=InverseMap | title=Inverse Map}}): Inverse map
- Inverse Matrix ({{MathWorld | urlname=InverseMatrix | title=Inverse Matrix}}): Inverse matrix
- Inverse Nome ({{MathWorld | urlname=InverseNome | title=Inverse Nome}}): Inverse nome
- Inverse Oblate Spheroidal Coordinates ({{MathWorld | urlname=InverseOblateSpheroidalCoordinates | title=Inverse Oblate Spheroidal Coordinates}}): Inverse oblate spheroidal coordinates
- Inverse Permutation ({{MathWorld | urlname=InversePermutation | title=Inverse Permutation}}): Inverse permutation
- Inverse Points ({{MathWorld | urlname=InversePoints | title=Inverse Points}}): Inverse points
- Inverse Problem ({{MathWorld | urlname=InverseProblem | title=Inverse Problem}}): Inverse problem
- Inverse Prolate Spheroidal Coordinates ({{MathWorld | urlname=InverseProlateSpheroidalCoordinates | title=Inverse Prolate Spheroidal Coordinates}}): Inverse prolate spheroidal coordinates
- Inverse Proportion ({{MathWorld | urlname=InverseProportion | title=Inverse Proportion}}): Inverse proportion
- Inverse Quadratic Interpolation ({{MathWorld | urlname=InverseQuadraticInterpolation | title=Inverse Quadratic Interpolation}}): Inverse quadratic interpolation
- Inverse Scattering Method ({{MathWorld | urlname=InverseScatteringMethod | title=Inverse Scattering Method}}): Inverse scattering method
- Inverse Secant ({{MathWorld | urlname=InverseSecant | title=Inverse Secant}}): Inverse secant
- Inverse Semigroup ({{MathWorld | urlname=InverseSemigroup | title=Inverse Semigroup}}): Inverse semigroup
- Inverse Series ({{MathWorld | urlname=InverseSeries | title=Inverse Series}}): Inverse series
- Inverse Sine ({{MathWorld | urlname=InverseSine | title=Inverse Sine}}): Inverse sine
- Inverse System ({{MathWorld | urlname=InverseSystem | title=Inverse System}}): Inverse system
- Inverse Tangent ({{MathWorld | urlname=InverseTangent | title=Inverse Tangent}}): Inverse tangent
- Inverse Tangent Integral ({{MathWorld | urlname=InverseTangentIntegral | title=Inverse Tangent Integral}}): Inverse tangent integral
- Inverse Trigonometric Functions ({{MathWorld | urlname=InverseTrigonometricFunctions | title=Inverse Trigonometric Functions}}): Inverse trigonometric functions
- InverseBetaRegularized ({{MathWorld | urlname=InverseBetaRegularized | title=InverseBetaRegularized}}): Inversebetaregularized
- InverseChiSquareDistribution ({{MathWorld | urlname=InverseChiSquareDistribution | title=InverseChiSquareDistribution}}): Inversechisquaredistribution
- InverseEllipticNomeQ ({{MathWorld | urlname=InverseEllipticNomeQ | title=InverseEllipticNomeQ}}): Inverseellipticnomeq
- InverseGammaRegularized ({{MathWorld | urlname=InverseGammaRegularized | title=InverseGammaRegularized}}): Inversegammaregularized
- InverseJacobiCD ({{MathWorld | urlname=InverseJacobiCD | title=InverseJacobiCD}}): Inversejacobicd
- InverseJacobiCN ({{MathWorld | urlname=InverseJacobiCN | title=InverseJacobiCN}}): Inversejacobicn
- InverseJacobiCS ({{MathWorld | urlname=InverseJacobiCS | title=InverseJacobiCS}}): Inversejacobics
- InverseJacobiDC ({{MathWorld | urlname=InverseJacobiDC | title=InverseJacobiDC}}): Inversejacobidc
- InverseJacobiDN ({{MathWorld | urlname=InverseJacobiDN | title=InverseJacobiDN}}): Inversejacobidn
- InverseJacobiDS ({{MathWorld | urlname=InverseJacobiDS | title=InverseJacobiDS}}): Inversejacobids
- InverseJacobiNC ({{MathWorld | urlname=InverseJacobiNC | title=InverseJacobiNC}}): Inversejacobinc
- InverseJacobiND ({{MathWorld | urlname=InverseJacobiND | title=InverseJacobiND}}): Inversejacobind
- InverseJacobiNS ({{MathWorld | urlname=InverseJacobiNS | title=InverseJacobiNS}}): Inversejacobins
- InverseJacobiSC ({{MathWorld | urlname=InverseJacobiSC | title=InverseJacobiSC}}): Inversejacobisc
- InverseJacobiSD ({{MathWorld | urlname=InverseJacobiSD | title=InverseJacobiSD}}): Inversejacobisd
- InverseJacobiSN ({{MathWorld | urlname=InverseJacobiSN | title=InverseJacobiSN}}): Inversejacobisn
- Inversely Proportional ({{MathWorld | urlname=InverselyProportional | title=Inversely Proportional}}): Inversely proportional
- Inversely Similar ({{MathWorld | urlname=InverselySimilar | title=Inversely Similar}}): Inversely similar
- InverseWeierstrassP ({{MathWorld | urlname=InverseWeierstrassP | title=InverseWeierstrassP}}): Inverseweierstrassp
- Inversion ({{MathWorld | urlname=Inversion | title=Inversion}}): Inversion
- Inversion Center ({{MathWorld | urlname=InversionCenter | title=Inversion Center}}): Inversion center
- Inversion Circle ({{MathWorld | urlname=InversionCircle | title=Inversion Circle}}): Inversion circle
- Inversion Number ({{MathWorld | urlname=InversionNumber | title=Inversion Number}}): Inversion number
- Inversion Operation ({{MathWorld | urlname=InversionOperation | title=Inversion Operation}}): Inversion operation
- Inversion Pole ({{MathWorld | urlname=InversionPole | title=Inversion Pole}}): Inversion pole
- Inversion Poset ({{MathWorld | urlname=InversionPoset | title=Inversion Poset}}): Inversion poset
- Inversion Radius ({{MathWorld | urlname=InversionRadius | title=Inversion Radius}}): Inversion radius
- Inversion Semigroup ({{MathWorld | urlname=InversionSemigroup | title=Inversion Semigroup}}): Inversion semigroup
- Inversion Sphere ({{MathWorld | urlname=InversionSphere | title=Inversion Sphere}}): Inversion sphere
- Inversion Statistic ({{MathWorld | urlname=InversionStatistic | title=Inversion Statistic}}): Inversion statistic
- Inversion Vector ({{MathWorld | urlname=InversionVector | title=Inversion Vector}}): Inversion vector
- Inversive Distance ({{MathWorld | urlname=InversiveDistance | title=Inversive Distance}}): Inversive distance
- Inversive Geometry ({{MathWorld | urlname=InversiveGeometry | title=Inversive Geometry}}): Inversive geometry
- Inversive Plane ({{MathWorld | urlname=InversivePlane | title=Inversive Plane}}): Inversive plane
- Inverted Funnel ({{MathWorld | urlname=InvertedFunnel | title=Inverted Funnel}}): Inverted funnel
- Inverted Snub Dodecadodecahedron ({{MathWorld | urlname=InvertedSnubDodecadodecahedron | title=Inverted Snub Dodecadodecahedron}}): Inverted snub dodecadodecahedron
- Invertible ({{MathWorld | urlname=Invertible | title=Invertible}}): Invertible
- Invertible Element ({{MathWorld | urlname=InvertibleElement | title=Invertible Element}}): Invertible element
- Invertible Knot ({{MathWorld | urlname=InvertibleKnot | title=Invertible Knot}}): Invertible knot
- Invertible Linear Map ({{MathWorld | urlname=InvertibleLinearMap | title=Invertible Linear Map}}): Invertible linear map
- Invertible Linear Transformation ({{MathWorld | urlname=InvertibleLinearTransformation | title=Invertible Linear Transformation}}): Invertible linear transformation
- Invertible Link ({{MathWorld | urlname=InvertibleLink | title=Invertible Link}}): Invertible link
- Invertible Matrix ({{MathWorld | urlname=InvertibleMatrix | title=Invertible Matrix}}): Invertible matrix
- Invertible Polynomial ({{MathWorld | urlname=InvertiblePolynomial | title=Invertible Polynomial}}): Invertible polynomial
- Invertible Polynomial Map ({{MathWorld | urlname=InvertiblePolynomialMap | title=Invertible Polynomial Map}}): Invertible polynomial map
- Involute ({{MathWorld | urlname=Involute | title=Involute}}): Involute
- Involution ({{MathWorld | urlname=Involution | title=Involution}}): Involution
- Involution Principle ({{MathWorld | urlname=InvolutionPrinciple | title=Involution Principle}}): Involution principle
- Involutive Algebra ({{MathWorld | urlname=InvolutiveAlgebra | title=Involutive Algebra}}): Involutive algebra
- Involutive Banach Algebra ({{MathWorld | urlname=InvolutiveBanachAlgebra | title=Involutive Banach Algebra}}): Involutive banach algebra
- Involutory ({{MathWorld | urlname=Involutory | title=Involutory}}): Involutory
- Involutory Matrix ({{MathWorld | urlname=InvolutoryMatrix | title=Involutory Matrix}}): Involutory matrix
- Iofinova-Ivanov Graphs ({{MathWorld | urlname=Iofinova-IvanovGraphs | title=Iofinova-Ivanov Graphs}}): Iofinova-ivanov graphs
- Irradiation Illusion ({{MathWorld | urlname=IrradiationIllusion | title=Irradiation Illusion}}): Irradiation illusion
- Irrational Number ({{MathWorld | urlname=IrrationalNumber | title=Irrational Number}}): Irrational number
- Irrationality Estimate ({{MathWorld | urlname=IrrationalityEstimate | title=Irrationality Estimate}}): Irrationality estimate
- Irrationality Exponent ({{MathWorld | urlname=IrrationalityExponent | title=Irrationality Exponent}}): Irrationality exponent
- Irrationality Measure ({{MathWorld | urlname=IrrationalityMeasure | title=Irrationality Measure}}): Irrationality measure
- Irrationality Sequence ({{MathWorld | urlname=IrrationalitySequence | title=Irrationality Sequence}}): Irrationality sequence
- Irreducible Element ({{MathWorld | urlname=IrreducibleElement | title=Irreducible Element}}): Irreducible element
- Irreducible Fraction ({{MathWorld | urlname=IrreducibleFraction | title=Irreducible Fraction}}): Irreducible fraction
- Irreducible Ideal ({{MathWorld | urlname=IrreducibleIdeal | title=Irreducible Ideal}}): Irreducible ideal
- Irreducible Matrix ({{MathWorld | urlname=IrreducibleMatrix | title=Irreducible Matrix}}): Irreducible matrix
- Irreducible Module ({{MathWorld | urlname=IrreducibleModule | title=Irreducible Module}}): Irreducible module
- Irreducible Polynomial ({{MathWorld | urlname=IrreduciblePolynomial | title=Irreducible Polynomial}}): Irreducible polynomial
- Irreducible Representation ({{MathWorld | urlname=IrreducibleRepresentation | title=Irreducible Representation}}): Irreducible representation
- Irreducible Ring ({{MathWorld | urlname=IrreducibleRing | title=Irreducible Ring}}): Irreducible ring
- Irreducible Semiperfect Number ({{MathWorld | urlname=IrreducibleSemiperfectNumber | title=Irreducible Semiperfect Number}}): Irreducible semiperfect number
- Irreducible Submodule ({{MathWorld | urlname=IrreducibleSubmodule | title=Irreducible Submodule}}): Irreducible submodule
- Irreducible Tensor ({{MathWorld | urlname=IrreducibleTensor | title=Irreducible Tensor}}): Irreducible tensor
- Irreducible Variety ({{MathWorld | urlname=IrreducibleVariety | title=Irreducible Variety}}): Irreducible variety
- IrreduciblePolynomialQ ({{MathWorld | urlname=IrreduciblePolynomialQ | title=IrreduciblePolynomialQ}}): Irreduciblepolynomialq
- Irredundant Ramsey Number ({{MathWorld | urlname=IrredundantRamseyNumber | title=Irredundant Ramsey Number}}): Irredundant ramsey number
- Irreflexive ({{MathWorld | urlname=Irreflexive | title=Irreflexive}}): Irreflexive
- Irregular Pair ({{MathWorld | urlname=IrregularPair | title=Irregular Pair}}): Irregular pair
- Irregular Prime ({{MathWorld | urlname=IrregularPrime | title=Irregular Prime}}): Irregular prime
- Irregular Singularity ({{MathWorld | urlname=IrregularSingularity | title=Irregular Singularity}}): Irregular singularity
- Irrotational Field ({{MathWorld | urlname=IrrotationalField | title=Irrotational Field}}): Irrotational field
- Isarithm ({{MathWorld | urlname=Isarithm | title=Isarithm}}): Isarithm
- ISBN ({{MathWorld | urlname=ISBN | title=ISBN}}): Isbn
- Iseki's Formula ({{MathWorld | urlname=IsekisFormula | title=Iseki's Formula}}): Iseki's formula
- Ishango Bone ({{MathWorld | urlname=IshangoBone | title=Ishango Bone}}): Ishango bone
- Island ({{MathWorld | urlname=Island | title=Island}}): Island
- Isobaric Polynomial ({{MathWorld | urlname=IsobaricPolynomial | title=Isobaric Polynomial}}): Isobaric polynomial
- Isochronous Curve ({{MathWorld | urlname=IsochronousCurve | title=Isochronous Curve}}): Isochronous curve
- Isoclinal ({{MathWorld | urlname=Isoclinal | title=Isoclinal}}): Isoclinal
- Isoclinal Line ({{MathWorld | urlname=IsoclinalLine | title=Isoclinal Line}}): Isoclinal line
- Isoclinal Plane ({{MathWorld | urlname=IsoclinalPlane | title=Isoclinal Plane}}): Isoclinal plane
- Isocline ({{MathWorld | urlname=Isocline | title=Isocline}}): Isocline
- Isoclinic Groups ({{MathWorld | urlname=IsoclinicGroups | title=Isoclinic Groups}}): Isoclinic groups
- Isoconjugation ({{MathWorld | urlname=Isoconjugation | title=Isoconjugation}}): Isoconjugation
- Isocubic ({{MathWorld | urlname=Isocubic | title=Isocubic}}): Isocubic
- Isodynamic Circles ({{MathWorld | urlname=IsodynamicCircles | title=Isodynamic Circles}}): Isodynamic circles
- Isodynamic Points ({{MathWorld | urlname=IsodynamicPoints | title=Isodynamic Points}}): Isodynamic points
- Isoenergetic Nondegeneracy ({{MathWorld | urlname=IsoenergeticNondegeneracy | title=Isoenergetic Nondegeneracy}}): Isoenergetic nondegeneracy
- Isogeny ({{MathWorld | urlname=Isogeny | title=Isogeny}}): Isogeny
- Isogonal Conjugate ({{MathWorld | urlname=IsogonalConjugate | title=Isogonal Conjugate}}): Isogonal conjugate
- Isogonal Cubic ({{MathWorld | urlname=IsogonalCubic | title=Isogonal Cubic}}): Isogonal cubic
- Isogonal Line ({{MathWorld | urlname=IsogonalLine | title=Isogonal Line}}): Isogonal line
- Isogonal Mapping ({{MathWorld | urlname=IsogonalMapping | title=Isogonal Mapping}}): Isogonal mapping
- Isogonal Mittenpunkt ({{MathWorld | urlname=IsogonalMittenpunkt | title=Isogonal Mittenpunkt}}): Isogonal mittenpunkt
- Isogonal Transform ({{MathWorld | urlname=IsogonalTransform | title=Isogonal Transform}}): Isogonal transform
- Isogonal Transformation ({{MathWorld | urlname=IsogonalTransformation | title=Isogonal Transformation}}): Isogonal transformation
- Isogonic Centers ({{MathWorld | urlname=IsogonicCenters | title=Isogonic Centers}}): Isogonic centers
- Isogonic Points ({{MathWorld | urlname=IsogonicPoints | title=Isogonic Points}}): Isogonic points
- Isograph ({{MathWorld | urlname=Isograph | title=Isograph}}): Isograph
- Isohedral Tiling ({{MathWorld | urlname=IsohedralTiling | title=Isohedral Tiling}}): Isohedral tiling
- Isohedron ({{MathWorld | urlname=Isohedron | title=Isohedron}}): Isohedron
- Isolated Point ({{MathWorld | urlname=IsolatedPoint | title=Isolated Point}}): Isolated point
- Isolated Singular Point ({{MathWorld | urlname=IsolatedSingularPoint | title=Isolated Singular Point}}): Isolated singular point
- Isolated Singularity ({{MathWorld | urlname=IsolatedSingularity | title=Isolated Singularity}}): Isolated singularity
- Isolating Integral ({{MathWorld | urlname=IsolatingIntegral | title=Isolating Integral}}): Isolating integral
- Isometric ({{MathWorld | urlname=Isometric | title=Isometric}}): Isometric
- Isometric Grid ({{MathWorld | urlname=IsometricGrid | title=Isometric Grid}}): Isometric grid
- Isometric Latitude ({{MathWorld | urlname=IsometricLatitude | title=Isometric Latitude}}): Isometric latitude
- Isometry ({{MathWorld | urlname=Isometry | title=Isometry}}): Isometry
- Isometry Element ({{MathWorld | urlname=IsometryElement | title=Isometry Element}}): Isometry element
- Isomorphic ({{MathWorld | urlname=Isomorphic | title=Isomorphic}}): Isomorphic
- Isomorphic Factorization ({{MathWorld | urlname=IsomorphicFactorization | title=Isomorphic Factorization}}): Isomorphic factorization
- Isomorphic Graphs ({{MathWorld | urlname=IsomorphicGraphs | title=Isomorphic Graphs}}): Isomorphic graphs
- Isomorphic Groups ({{MathWorld | urlname=IsomorphicGroups | title=Isomorphic Groups}}): Isomorphic groups
- Isomorphic Posets ({{MathWorld | urlname=IsomorphicPosets | title=Isomorphic Posets}}): Isomorphic posets
- Isomorphism ({{MathWorld | urlname=Isomorphism | title=Isomorphism}}): Isomorphism
- Isoperimetric Inequality ({{MathWorld | urlname=IsoperimetricInequality | title=Isoperimetric Inequality}}): Isoperimetric inequality
- Isoperimetric Point ({{MathWorld | urlname=IsoperimetricPoint | title=Isoperimetric Point}}): Isoperimetric point
- Isoperimetric Problem ({{MathWorld | urlname=IsoperimetricProblem | title=Isoperimetric Problem}}): Isoperimetric problem
- Isoperimetric Quotient ({{MathWorld | urlname=IsoperimetricQuotient | title=Isoperimetric Quotient}}): Isoperimetric quotient
- Isoperimetric Theorem ({{MathWorld | urlname=IsoperimetricTheorem | title=Isoperimetric Theorem}}): Isoperimetric theorem
- Isopleth ({{MathWorld | urlname=Isopleth | title=Isopleth}}): Isopleth
- Isopolar Line ({{MathWorld | urlname=IsopolarLine | title=Isopolar Line}}): Isopolar line
- Isopole ({{MathWorld | urlname=Isopole | title=Isopole}}): Isopole
- Isoptic Curve ({{MathWorld | urlname=IsopticCurve | title=Isoptic Curve}}): Isoptic curve
- Isosceles Right Triangle ({{MathWorld | urlname=IsoscelesRightTriangle | title=Isosceles Right Triangle}}): Isosceles right triangle
- Isosceles Right Triangle Line Picking ({{MathWorld | urlname=IsoscelesRightTriangleLinePicking | title=Isosceles Right Triangle Line Picking}}): Isosceles right triangle line picking
- Isosceles Tetrahedron ({{MathWorld | urlname=IsoscelesTetrahedron | title=Isosceles Tetrahedron}}): Isosceles tetrahedron
- Isosceles Trapezium ({{MathWorld | urlname=IsoscelesTrapezium | title=Isosceles Trapezium}}): Isosceles trapezium
- Isosceles Trapezoid ({{MathWorld | urlname=IsoscelesTrapezoid | title=Isosceles Trapezoid}}): Isosceles trapezoid
- Isosceles Triangle ({{MathWorld | urlname=IsoscelesTriangle | title=Isosceles Triangle}}): Isosceles triangle
- Isoscelizer ({{MathWorld | urlname=Isoscelizer | title=Isoscelizer}}): Isoscelizer
- Isospectral Graphs ({{MathWorld | urlname=IsospectralGraphs | title=Isospectral Graphs}}): Isospectral graphs
- Isospectral Manifolds ({{MathWorld | urlname=IsospectralManifolds | title=Isospectral Manifolds}}): Isospectral manifolds
- Isosurface ({{MathWorld | urlname=Isosurface | title=Isosurface}}): Isosurface
- Isothermal Parameterization ({{MathWorld | urlname=IsothermalParameterization | title=Isothermal Parameterization}}): Isothermal parameterization
- Isotomic Conjugate ({{MathWorld | urlname=IsotomicConjugate | title=Isotomic Conjugate}}): Isotomic conjugate
- Isotomic Cubic ({{MathWorld | urlname=IsotomicCubic | title=Isotomic Cubic}}): Isotomic cubic
- Isotomic Lines ({{MathWorld | urlname=IsotomicLines | title=Isotomic Lines}}): Isotomic lines
- Isotomic Transform ({{MathWorld | urlname=IsotomicTransform | title=Isotomic Transform}}): Isotomic transform
- Isotomic Transversal ({{MathWorld | urlname=IsotomicTransversal | title=Isotomic Transversal}}): Isotomic transversal
- Isotone Map ({{MathWorld | urlname=IsotoneMap | title=Isotone Map}}): Isotone map
- Isotope ({{MathWorld | urlname=Isotope | title=Isotope}}): Isotope
- Isotopy ({{MathWorld | urlname=Isotopy | title=Isotopy}}): Isotopy
- Isotropic Line ({{MathWorld | urlname=IsotropicLine | title=Isotropic Line}}): Isotropic line
- Isotropic Point ({{MathWorld | urlname=IsotropicPoint | title=Isotropic Point}}): Isotropic point
- Isotropic Tensor ({{MathWorld | urlname=IsotropicTensor | title=Isotropic Tensor}}): Isotropic tensor
- Isotropy Group ({{MathWorld | urlname=IsotropyGroup | title=Isotropy Group}}): Isotropy group
- Isovolume Problem ({{MathWorld | urlname=IsovolumeProblem | title=Isovolume Problem}}): Isovolume problem
- Isozonohedron ({{MathWorld | urlname=Isozonohedron | title=Isozonohedron}}): Isozonohedron
- Isthmus ({{MathWorld | urlname=Isthmus | title=Isthmus}}): Isthmus
- Itô's Lemma ({{MathWorld | urlname=ItosLemma | title=Itô's Lemma}}): Itô's lemma
- Itô's Theorem ({{MathWorld | urlname=ItosTheorem | title=Itô's Theorem}}): Itô's theorem
- Iterated Exponential ({{MathWorld | urlname=IteratedExponential | title=Iterated Exponential}}): Iterated exponential
- Iterated Function System ({{MathWorld | urlname=IteratedFunctionSystem | title=Iterated Function System}}): Iterated function system
- Iterated Integral ({{MathWorld | urlname=IteratedIntegral | title=Iterated Integral}}): Iterated integral
- Iterated Map ({{MathWorld | urlname=IteratedMap | title=Iterated Map}}): Iterated map
- Iterated Radical ({{MathWorld | urlname=IteratedRadical | title=Iterated Radical}}): Iterated radical
- Iterated Run-Length Encoding ({{MathWorld | urlname=IteratedRun-LengthEncoding | title=Iterated Run-Length Encoding}}): Iterated run-length encoding
- Iteration ({{MathWorld | urlname=Iteration | title=Iteration}}): Iteration
- Iteration Sequence ({{MathWorld | urlname=IterationSequence | title=Iteration Sequence}}): Iteration sequence
- Iteration Theorem ({{MathWorld | urlname=IterationTheorem | title=Iteration Theorem}}): Iteration theorem
- Ivanov-Ivanov-Faradjev Graph ({{MathWorld | urlname=Ivanov-Ivanov-FaradjevGraph | title=Ivanov-Ivanov-Faradjev Graph}}): Ivanov-ivanov-faradjev graph
- Iverson Bracket ({{MathWorld | urlname=IversonBracket | title=Iverson Bracket}}): Iverson bracket
- Iwasawa Decomposition ({{MathWorld | urlname=IwasawaDecomposition | title=Iwasawa Decomposition}}): Iwasawa decomposition
- Iwasawa's Theorem ({{MathWorld | urlname=IwasawasTheorem | title=Iwasawa's Theorem}}): Iwasawa's theorem