Free Boundary Problems

Regularity Properties Near the Fixed Boundary
Author: Darya Apushkinskaya
Publisher: Springer
ISBN: 3319970798
Category: Mathematics
Page: 146
View: 4668

Continue Reading →

This book is concerned with several elliptic and parabolic obstacle-type problems with a focus on the cases where the free and fixed boundaries meet. The results presented complement those found in existing books in the subject, which mainly treat regularity properties away from the fixed boundary. The topics include optimal regularity, analysis of global solutions, tangential touch of the free and fixed boundaries, as well as Lipschitz- and $C^1$-regularity of the free boundary. Special attention is given to local versions of various monotonicity formulas. The intended audience includes research mathematicians and advanced graduate students interested in problems with free boundaries.

Convex Variational Problems with Linear, Nearly Linear And/or Anisotropic Growth Conditions


Author: Michael Bildhauer
Publisher: Springer Science & Business Media
ISBN: 9783540402985
Category: Mathematics
Page: 217
View: 8116

Continue Reading →

The author emphasizes a non-uniform ellipticity condition as the main approach to regularity theory for solutions of convex variational problems with different types of non-standard growth conditions. This volume first focuses on elliptic variational problems with linear growth conditions. Here the notion of a "solution" is not obvious and the point of view has to be changed several times in order to get some deeper insight. Then the smoothness properties of solutions to convex anisotropic variational problems with superlinear growth are studied. In spite of the fundamental differences, a non-uniform ellipticity condition serves as the main tool towards a unified view of the regularity theory for both kinds of problems.

Convex Variational Problems

Linear, nearly Linear and Anisotropic Growth Conditions
Author: Michael Bildhauer
Publisher: Springer
ISBN: 3540448853
Category: Mathematics
Page: 220
View: 5462

Continue Reading →

The author emphasizes a non-uniform ellipticity condition as the main approach to regularity theory for solutions of convex variational problems with different types of non-standard growth conditions. This volume first focuses on elliptic variational problems with linear growth conditions. Here the notion of a "solution" is not obvious and the point of view has to be changed several times in order to get some deeper insight. Then the smoothness properties of solutions to convex anisotropic variational problems with superlinear growth are studied. In spite of the fundamental differences, a non-uniform ellipticity condition serves as the main tool towards a unified view of the regularity theory for both kinds of problems.

Energy Methods for Free Boundary Problems

Applications to Nonlinear PDEs and Fluid Mechanics
Author: S.N. Antontsev,J.I. Diaz,S. Shmarev
Publisher: Springer Science & Business Media
ISBN: 1461200911
Category: Technology & Engineering
Page: 332
View: 1974

Continue Reading →

For the past several decades, the study of free boundary problems has been a very active subject of research occurring in a variety of applied sciences. What these problems have in common is their formulation in terms of suitably posed initial and boundary value problems for nonlinear partial differential equations. Such problems arise, for example, in the mathematical treatment of the processes of heat conduction, filtration through porous media, flows of non-Newtonian fluids, boundary layers, chemical reactions, semiconductors, and so on. The growing interest in these problems is reflected by the series of meetings held under the title "Free Boundary Problems: Theory and Applications" (Ox ford 1974, Pavia 1979, Durham 1978, Montecatini 1981, Maubuisson 1984, Irsee 1987, Montreal 1990, Toledo 1993, Zakopane 1995, Crete 1997, Chiba 1999). From the proceedings of these meetings, we can learn about the different kinds of mathematical areas that fall within the scope of free boundary problems. It is worth mentioning that the European Science Foundation supported a vast research project on free boundary problems from 1993 until 1999. The recent creation of the specialized journal Interfaces and Free Boundaries: Modeling, Analysis and Computation gives us an idea of the vitality of the subject and its present state of development. This book is a result of collaboration among the authors over the last 15 years.

Two-dimensional geometric variational problems


Author: Jürgen Jost
Publisher: John Wiley & Sons Inc
ISBN: N.A
Category: Mathematics
Page: 236
View: 4897

Continue Reading →

This monograph treats variational problems for mappings from a surface equipped with a conformal structure into Euclidean space or a Riemannian manifold. Presents a general theory of such variational problems, proving existence and regularity theorems with particular conceptual emphasis on the geometric aspects of the theory and thorough investigation of the connections with complex analysis. Among the topics covered are: Plateau's problem, the regularity theory of solutions, a variational approach for obtaining various conformal representation theorems, a general existence theorem for harmonic mappings, and a new approach to Teichmuller theory via harmonic maps.

Error Analysis in Numerical Processes


Author: Solomon G. Mikhlin
Publisher: Wiley
ISBN: N.A
Category: Mathematics
Page: 286
View: 4325

Continue Reading →

Extends the traditional classification of errors so that the error of the method (truncation error) and the numerical error are subdivided into four classes: the approximation, the perturbation, the algorithm and the rounding error. This new subdivision of errors results in error estimates for a number of linear and nonlinear problems in numerical analysis. Obtained here are new results--errors in the conjugate direction method--as well as known results, such as errors in Gaussian elimination. Also presented are a posteriori error estimates, such as those derived for, and often by means of, the computed approximate solution.

Applied nonlinear analysis


Author: Jean Pierre Aubin,Ivar Ekeland
Publisher: John Wiley & Sons
ISBN: N.A
Category: Mathematics
Page: 518
View: 4526

Continue Reading →

This introductory text offers simple presentations of the fundamentals of nonlinear analysis, with direct proofs and clear applications. Topics include smooth/nonsmooth functions, convex/nonconvex variational problems, economics, and mechanics. 1984 edition.

Amenable locally compact groups


Author: Jean-Paul Pier
Publisher: Wiley-Interscience
ISBN: N.A
Category: Mathematics
Page: 418
View: 6776

Continue Reading →

Collects the most recent results scattered throughout the literature on the theory of amenable groups, presenting a detailed investigation of the major features. The first part of the book discusses the different types of amenability properties, with basic examples listed. The second part provides complementary information on various aspects of amenability and a look at future directions.