Nonlinear functional analysis is a branch of mathematical analysis that deals with nonlinear mappingss.

Topics

Its subject matter includes:

• generalizations of calculus to Banach spaces

• implicit function theorems

• fixed-point theorems (Brouwer fixed point theorem, Fixed point theorems in infinite-dimensional spaces, topological degree theory, Jordan separation theorem, Lefschetz fixed-point theorem)

• Morse theory and Lusternik–Schnirelmann category theory

• methods of complex function theory

See also

• Functional analysis

Notes