Roger D. Nussbaum

Roger David Nussbaum (born 29 January 1944 in Philadelphia)[1] is an American mathematician, specializing in nonlinear functional analysis and differential equations.

Nussbaum graduated in 1965 with a bachelor's degree from Harvard University. He received his Ph.D. in 1969 from the University of Chicago with thesis The Fixed Point Index and Fixed Point Theorems for K-Set Contractions supervised by Felix Browder.[2] At Rutgers University Nussbaum became in 1969 an assistant professor, in 1973 an associate professor, and in 1977 a full professor. He retired there as professor emeritus.[3] He was elected in 2012 a Fellow of the American Mathematical Society.

Selected publicationsEdit

  • with Bas Lemmens: Nonlinear Perron-Frobenius Theory, Cambridge Tracts in Mathematics, Cambridge University Press 2012
  • with S. M. Verduyn-Lunel: Generalizations of the Perron-Frobenius Theorem for Nonlinear Maps, Memoirs AMS 1999
  • with Heinz-Otto Peitgen: Special and Spurious Solutions of  , Memoirs AMS, 1984
  • with Patrick Fitzpatrick, Jean Mawhin, Mario Martelli: Topological Methods for Ordinary Differential Equations, CIME Lectures, Montecacini Terme 1991, Lecture Notes in Mathematics 1537, Springer Verlag 1993
  • Hilbert's projective metric and iterated nonlinear maps, 2 vols., AMS 1988
  • Differential-delay equations with two time lags, Memoirs AMS 1978


  1. ^ biographical information from American Men and Women of Science, Thomson Gale 2004
  2. ^ Roger David Nussbaum at the Mathematics Genealogy Project
  3. ^ "Roger D. Nussbaum". Mathematics Department, Rutgers University.