Nonstandard describes a state not conforming to standards.
Nonstandard or non-standard may also refer to:
- non-standard analysis, the use of infinitesimals to formulate calculus
- non-standard model, in model theory, a model that is not isomorphic to the standard model, especially models of Peano arithmetic
- non-standard cosmology, models which do not conform to current scientific consensus
This disambiguation page lists articles associated with the title Nonstandard.
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