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 publications
  • 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

References
  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.
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