For striking and seminal contributions to the theory of nonlinear partial differential equations and its applications to geometric analysis John F. Nash Jr. was awarded the Abel Prize alongside Louis Nirenberg.
This volume comprises highly selected contributions by some of the most eminent mathematicians in the international mathematical community on longstanding problems in very active domains of mathematical research. A joint preface by the two volume editors is followed by a personal farewell to John F. Nash, Jr. written by Michael Th. Rassias.