The objectives of this monograph are to present some topics from the theory of monotone operators and nonlinear
semigroup theory which are directly applicable to the existence and uniqueness theory of initial-
boundary-value problems for
partial differential equations and to construct such operators as realizations of those problems in appropriate function spaces. A highlight of this presentation is the large number and variety of examples introduced to illustrate the connection between the theory of nonlinear operators and partial differential equations. These include primarily semilinear or quasilinear
equations of elliptic or of parabolic type, degenerate cases with change of type, related systems and variational inequalities, and spatial boundary conditions of the usual
Dirichlet,
Neumann, Robin or
dynamic type.