The maximum principle induces an order structure for partial differential equations, and has become an important tool in nonlinear analysis. This book is the fi

The maximum principle induces an order structure for partial differential equations, and has become an important tool in nonlinear analysis. This book is the fi

This volume covers recent advances in the field of nonlinear functional analysis and its applications to nonlinear partial and ordinary differential equations,

The topological methods based on fixed-point theory and on local topological degree which have been developed by Leray, Schauder, Nirenberg, Cesari and others f