In this book, fundamental methods of nonlinear analysis are introduced,
discussed and illustrated in straightforward examples. Each method
considered is motivated and explained in its general form, but presented
in an abstract framework as comprehensively as possible. A large number
of methods are applied to boundary value problems for both ordinary and
partial differential equations. In this edition we have made minor
revisions, added new material and organized the content slightly
differently.
In particular, we included evolutionary equations and differential
equations on manifolds. The applications to partial differential
equations follow every abstract framework of the method in question.
The text is structured in two levels: a self-contained basic level and
an advanced level - organized in appendices - for the more experienced
reader. The last chapter contains more involved material and can be
skipped by those new to the field. This book serves as both a textbook
for graduate-level courses and a reference book for mathematicians,
engineers and applied scientists