# Motreanu, D.

Overview
Works: 15 works in 88 publications in 2 languages and 1,683 library holdings Author QA316, 515.64
Publication Timeline
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Most widely held works by D Motreanu
Nonsmooth variational problems and their inequalities : comparison principles and applications by S Carl( Book )

23 editions published between 2007 and 2011 in English and held by 193 WorldCat member libraries worldwide

"This monograph focuses primarily on nonsmooth variational problems that arise from boundary value problems with nonsmooth data and/or nonsmooth constraints, such as multivalued elliptic problems, variational inequalities, hemivariational inequalities, and their corresponding evolution problems." "This text is an invaluable reference for researchers and graduate students in mathematics (functional analysis, partial differential equations, elasticity, applications in materials science and mechanics) as well as physicists and engineers."--Jacket
Tangency, flow invariance for differential equations, and optimization problems by D Motreanu( Book )

11 editions published in 1999 in English and held by 156 WorldCat member libraries worldwide

Handbook of nonconvex analysis and applications( Book )

4 editions published in 2010 in English and held by 103 WorldCat member libraries worldwide

Minimax theorems and qualitative properties of the solutions of hemivariational inequalities by D Motreanu( Book )

11 editions published between 1999 and 2014 in English and held by 100 WorldCat member libraries worldwide

The present book is the first ever published in which a new type of eigenvalue problem is studied, one that is very useful for applications: eigenvalue problems related to hemivariational inequalities, i.e. involving nonsmooth, nonconvex, energy functions. New existence, multiplicity and perturbation results are proved using three different approaches: minimization, minimax methods and (sub)critical point theory. Nonresonant and resonant cases are studied both for static and dynamic problems and several new qualitative properties of the hemivariational inequalities are obtained. Both simple and double eigenvalue problems are studied, as well as those constrained on the sphere and those which are unconstrained. The book is self-contained, is written with the utmost possible clarity and contains highly original results. Applications concerning new stability results for beams, plates and shells with adhesive supports, etc. illustrate the theory. Audience: applied and pure mathematicians, civil, aeronautical and mechanical engineers
Variational and non-variational methods in nonlinear analysis and boundary value problems by D Motreanu( Book )

9 editions published between 2003 and 2011 in English and held by 98 WorldCat member libraries worldwide

The book provides a comprehensive exposition of modern topics in nonlinear analysis with applications to various boundary value problems with discontinuous nonlinearities and nonsmooth constraints. Our framework includes multivalued elliptic problems with discontinuities, variational inequalities, hemivariational inequalities and evolution problems. In addition to the existence of solutions, a major part of the book is devoted to the study of different qualitative properties such as multiplicity, location, extremality, and stability. The treatment relies on variational methods, monotonicity principles, topological arguments and optimization techniques. The book is based on the authors' original results obtained in the last decade. A great deal of the material is published for the first time in this book and is organized in a unifying way. The book is self-contained. The abstract results are illustrated through various examples and applications
Variational and hemivariational inequalities : theory, methods, and applications( Book )

2 editions published in 2003 in English and held by 51 WorldCat member libraries worldwide

Topological and variational methods with applications to nonlinear boundary value problems by D Motreanu( Book )

13 editions published between 2014 and 2016 in English and held by 35 WorldCat member libraries worldwide

This book focuses on nonlinear boundary value problems and the aspects of nonlinear analysis which are necessary to their study. The authors first give a comprehensive introduction to the many different classical methods from nonlinear analysis, variational principles, and Morse theory. They then provide a rigorous and detailed treatment of the relevant areas of nonlinear analysis with new applications to nonlinear boundary value problems for both ordinary and partial differential equations. Recent results on the existence and multiplicity of critical points for both smooth and nonsmooth functional, developments on the degree theory of monotone type operators, nonlinear maximum and comparison principles for p-Laplacian type operators, and new developments on nonlinear Neumann problems involving non-homogeneous differential operator appears for the first time in book form. The presentation is systematic, and an extensive bibliography and a remarks section at the end of each chapter highlight the text. This work will serve as an invaluable reference for researchers working in nonlinear analysis and partial differential equations as well as a useful tool for all those interested in the topics presented
Variational amd hemivariational inequalities : theory, methods and applications. 2, Unilateral problems by D Goeleven( Book )

7 editions published in 2003 in English and held by 12 WorldCat member libraries worldwide

This book includes a self-contained theory of inequality problems and their applications to unilateral mechanics. Fundamental theoretical results and related methods of analysis are discussed on various examples and applications in mechanics. The work can be seen as a book of applied nonlinear analysis entirely devoted to the study of inequality problems, i.e. variational inequalities and hemivariational inequalities in mathematical models and their corresponding applications to unilateral mechanics. It contains a systematic investigation of the interplay between theoretical results and concrete problems in mechanics. It is the first textbook including a comprehensive and systematic study of both elliptic, parabolic and hyperbolic inequality models, dynamical unilateral systems and unilateral eigenvalues problems. The book is self-contained and it offers, for the first time, the possibility to learn about inequality models and to acquire the essence of the theory in a relatively short time. Audience: The book is suitable for researchers, and for doctoral and post-doctoral courses
Analiza variationala cu aplicatii in probleme eliptice by D Motreanu( Book )

1 edition published in 1996 in Romanian and held by 2 WorldCat member libraries worldwide

Quasi tangent vectors in flow-invariance and optimization problems on Bana h manifolds by D Motreanu( Book )

2 editions published between 1980 and 1981 in English and held by 2 WorldCat member libraries worldwide

On resonant Neumann problems by D Motreanu( )

1 edition published in 2012 in English and held by 1 WorldCat member library worldwide

We consider semilinear Neumann problems at resonance and prove existence and multiplicity theorems. The existence theorems allow resonance with respect to any eigenvalue of the negative Neumann Laplacian. The multiplicity theorems concern problems resonant at 0 (the principal eigenvalue) or at the first nonzero eigenvalue. Our approach uses tools from critical point theory and from Morse theory
Existence results for inequality problems with lack of convexity by D Motreanu( )

1 edition published in 2000 in English and held by 1 WorldCat member library worldwide

We establish several existence results of Hartman-Stampacchia type for hemivariational inequalities on bounded and convex sets in a real reflexive Banach space. We also study the cases of coercive and noncoercive variational-hemivariational inequalities. Two applications on nonmonotone laws in networks and nonconvex semipermeability illustrate the abstract results
Eigenvalue problems for degenerate nonlinear elliptic equations in anisotropic media by D Motreanu( )

1 edition published in 2005 in English and held by 1 WorldCat member library worldwide

We study nonlinear eigenvalue problems of the form $-{\rm div}(a(x) \nabla u) = g(\lambda,x,u)$ in ${\Bbb R}^N$, where $a(x)$ is a degenerate nonnegative weight. We establish the existence of solutions and we obtain information on the multiplicity and location of solutions. Our approach is based on critical point theory in weighted Sobolev spaces combined with a Caffarelli-Kohn-Nirenberg type inequality. A specific minimax method is developed without making use of the Palais-Smale condition
A unified treatment using critical point methods of the existence of multiple solutions for superlinear and sublinear Neumann problems by D Motreanu( )

1 edition published in 2011 in English and held by 1 WorldCat member library worldwide

In this paper we present a framework which permits the unified treatment of the existence of multiple solutions for superlinear and sublinear Neumann problems. Using critical point theory, truncation techniques, the method of upper-lower solutions, Morse theory and the invariance properties of the negative gradient flow, we show that the problem can have seven nontrivial smooth solutions, four of which have constant sign and three are nodal

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Motreanu, D.

Motreanu, Dumitru

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