Elliptic Regularity Theory by Approximation Methods

Elliptic Regularity Theory by Approximation Methods
Author: Edgard A. Pimentel
Publisher: Cambridge University Press
Total Pages: 204
Release: 2022-06-30
Genre: Mathematics
ISBN: 1009103121

Presenting the basics of elliptic PDEs in connection with regularity theory, the book bridges fundamental breakthroughs – such as the Krylov–Safonov and Evans–Krylov results, Caffarelli's regularity theory, and the counterexamples due to Nadirashvili and Vlăduţ – and modern developments, including improved regularity for flat solutions and the partial regularity result. After presenting this general panorama, accounting for the subtleties surrounding C-viscosity and Lp-viscosity solutions, the book examines important models through approximation methods. The analysis continues with the asymptotic approach, based on the recession operator. After that, approximation techniques produce a regularity theory for the Isaacs equation, in Sobolev and Hölder spaces. Although the Isaacs operator lacks convexity, approximation methods are capable of producing Hölder continuity for the Hessian of the solutions by connecting the problem with a Bellman equation. To complete the book, degenerate models are studied and their optimal regularity is described.

Elliptic Regularity Theory by Approximation Methods

Elliptic Regularity Theory by Approximation Methods
Author: Edgard A. Pimentel
Publisher: Cambridge University Press
Total Pages: 203
Release: 2022-09-29
Genre: Mathematics
ISBN: 1009096664

A modern account of elliptic regularity theory, with a rigorous presentation of recent developments for fundamental models.

Numerical Solution of Elliptic and Parabolic Partial Differential Equations with CD-ROM

Numerical Solution of Elliptic and Parabolic Partial Differential Equations with CD-ROM
Author: John A. Trangenstein
Publisher: Cambridge University Press
Total Pages: 657
Release: 2013-04-18
Genre: Mathematics
ISBN: 0521877261

For mathematicians and engineers interested in applying numerical methods to physical problems this book is ideal. Numerical ideas are connected to accompanying software, which is also available online. By seeing the complete description of the methods in both theory and implementation, students will more easily gain the knowledge needed to write their own application programs or develop new theory. The book contains careful development of the mathematical tools needed for analysis of the numerical methods, including elliptic regularity theory and approximation theory. Variational crimes, due to quadrature, coordinate mappings, domain approximation and boundary conditions, are analyzed. The claims are stated with full statement of the assumptions and conclusions, and use subscripted constants which can be traced back to the origination (particularly in the electronic version, which can be found on the accompanying CD-ROM).

PDE Models for Multi-Agent Phenomena

PDE Models for Multi-Agent Phenomena
Author: Pierre Cardaliaguet
Publisher: Springer
Total Pages: 225
Release: 2018-12-22
Genre: Mathematics
ISBN: 3030019470

This volume covers selected topics addressed and discussed during the workshop “PDE models for multi-agent phenomena,” which was held in Rome, Italy, from November 28th to December 2nd, 2016. The content mainly focuses on kinetic equations and mean field games, which provide a solid framework for the description of multi-agent phenomena. The book includes original contributions on the theoretical and numerical study of the MFG system: the uniqueness issue and finite difference methods for the MFG system, MFG with state constraints, and application of MFG to market competition. The book also presents new contributions on the analysis and numerical approximation of the Fokker-Planck-Kolmogorov equations, the isotropic Landau model, the dynamical approach to the quantization problem and the asymptotic methods for fully nonlinear elliptic equations. Chiefly intended for researchers interested in the mathematical modeling of collective phenomena, the book provides an essential overview of recent advances in the field and outlines future research directions.

Elliptic Regularity Theory

Elliptic Regularity Theory
Author: Lisa Beck
Publisher: Springer
Total Pages: 214
Release: 2016-04-08
Genre: Mathematics
ISBN: 3319274856

These lecture notes provide a self-contained introduction to regularity theory for elliptic equations and systems in divergence form. After a short review of some classical results on everywhere regularity for scalar-valued weak solutions, the presentation focuses on vector-valued weak solutions to a system of several coupled equations. In the vectorial case, weak solutions may have discontinuities and so are expected, in general, to be regular only outside of a set of measure zero. Several methods are presented concerning the proof of such partial regularity results, and optimal regularity is discussed. Finally, a short overview is given on the current state of the art concerning the size of the singular set on which discontinuities may occur. The notes are intended for graduate and postgraduate students with a solid background in functional analysis and some familiarity with partial differential equations; they will also be of interest to researchers working on related topics.

Strongly Elliptic Systems and Boundary Integral Equations

Strongly Elliptic Systems and Boundary Integral Equations
Author: William Charles Hector McLean
Publisher: Cambridge University Press
Total Pages: 376
Release: 2000-01-28
Genre: Mathematics
ISBN: 9780521663755

This 2000 book provided the first detailed exposition of the mathematical theory of boundary integral equations of the first kind on non-smooth domains.

Numerical Solution of Hyperbolic Partial Differential Equations

Numerical Solution of Hyperbolic Partial Differential Equations
Author: John A. Trangenstein
Publisher: Cambridge University Press
Total Pages: 0
Release: 2009-09-03
Genre: Mathematics
ISBN: 052187727X

Numerical Solution of Hyperbolic Partial Differential Equations is a new type of graduate textbook, with both print and interactive electronic components (on CD). It is a comprehensive presentation of modern shock-capturing methods, including both finite volume and finite element methods, covering the theory of hyperbolic conservation laws and the theory of the numerical methods. The range of applications is broad enough to engage most engineering disciplines and many areas of applied mathematics. Classical techniques for judging the qualitative performance of the schemes are used to motivate the development of classical higher-order methods. The interactive CD gives access to the computer code used to create all of the text's figures, and lets readers run simulations, choosing their own input parameters; the CD displays the results of the experiments as movies. Consequently, students can gain an appreciation for both the dynamics of the problem application, and the growth of numerical errors.

An Indefinite Excursion in Operator Theory

An Indefinite Excursion in Operator Theory
Author: Aurelian Gheondea
Publisher: Cambridge University Press
Total Pages:
Release: 2022-07-28
Genre: Mathematics
ISBN: 1108981275

This modern introduction to operator theory on spaces with indefinite inner product discusses the geometry and the spectral theory of linear operators on these spaces, the deep interplay with complex analysis, and applications to interpolation problems. The text covers the key results from the last four decades in a readable way with full proofs provided throughout. Step by step, the reader is guided through the intricate geometry and topology of spaces with indefinite inner product, before progressing to a presentation of the geometry and spectral theory on these spaces. The author carefully highlights where difficulties arise and what tools are available to overcome them. With generous background material included in the appendices, this text is an excellent resource for researchers in operator theory, functional analysis, and related areas as well as for graduate students.

Surveys in Combinatorics 2024

Surveys in Combinatorics 2024
Author: Felix Fischer
Publisher: Cambridge University Press
Total Pages: 305
Release: 2024-06-13
Genre: Mathematics
ISBN: 1009490532

This volume contains surveys of current research directions in combinatorics written by leading researchers in their fields.

Groups and Graphs, Designs and Dynamics

Groups and Graphs, Designs and Dynamics
Author: R. A. Bailey
Publisher: Cambridge University Press
Total Pages: 452
Release: 2024-05-30
Genre: Mathematics
ISBN: 1009465945

This collection of four short courses looks at group representations, graph spectra, statistical optimality, and symbolic dynamics, highlighting their common roots in linear algebra. It leads students from the very beginnings in linear algebra to high-level applications: representations of finite groups, leading to probability models and harmonic analysis; eigenvalues of growing graphs from quantum probability techniques; statistical optimality of designs from Laplacian eigenvalues of graphs; and symbolic dynamics, applying matrix stability and K-theory. An invaluable resource for researchers and beginning Ph.D. students, this book includes copious exercises, notes, and references.