For more details about the topologies of the spaces P (Ω) and P/(Ω), see Yosida [1966], Vo-
Khac [1972a, 1972b], Hörmander [1983, Chapters 1–7], Duistermaat & Kolk [2010], and of …

This monograph focuses primarily on nonsmooth variational problems that arise from
boundary value problems with nonsmooth data and/or nonsmooth constraints, such as …

This monograph presents fundamental methods and topics in nonlinear analysis and their
efficient application to nonlinear boundary value problems for elliptic equations. The book is …

The aim of this paper is to establish the existence of a local minimum for a continuously
Gâteaux differentiable function, possibly unbounded from below, without requiring any weak …

Non-differentiable functionals and applications to elliptic problems with discontinuous
nonlinearities Page 1 J. Differential Equations 244 (2008) 3031–3059 www.elsevier.com/locate/jde …

Equilibrium Problems and Applications develops a unified variational approach to deal with
single-valued, set-valued and quasi-equilibrium problems. The authors promote original …

The foundation and a systematic study of variational inequalities date back to the 1960s of
the last century and began with the work of Fichera [113] and Stampacchia [225, 226], which …

The aim of this text is to introduce the reader to some basic tools from the theory of
monotone operators together with some of their applications. Although our main concern is …

This book provides a comprehensive introduction to the mathematical theory of nonlinear
problems described by elliptic partial differential equations. These equations can be seen as …

Here we study the approximate controllability for control problems driven by a class of
nonlinear evolution hemivariational inequalities in Hilbert spaces. Actually, our results cover …