Roger D. Nussbaum

1944

• Hilbert's projective metric and iterated nonlinear maps
• Differential-delay equations with two time lags
• Generalizations of the Perron-Frobenius theorem for nonlinear maps
• Iterated nonlinear maps and Hilbert's projective metric, II
• Special and spurious solutions of x(t) =-[alpha] f (x(t-1))
• The fixed point index and fixed point theorems for K-set-contractions
• The fixed point index and some applications