Heat Kernels for Elliptic and Sub-elliptic Operators
Heat Kernels for Elliptic and Sub-elliptic Operators

Author: Ovidiu Calin

Publisher: Springer Science & Business Media

Published: 2010-10-10

Total Pages: 444

ISBN-13: 0817649956

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This monograph is a unified presentation of several theories of finding explicit formulas for heat kernels for both elliptic and sub-elliptic operators. These kernels are important in the theory of parabolic operators because they describe the distribution of heat on a given manifold as well as evolution phenomena and diffusion processes. Heat Kernels for Elliptic and Sub-elliptic Operators is an ideal reference for graduate students, researchers in pure and applied mathematics, and theoretical physicists interested in understanding different ways of approaching evolution operators.

Heat Kernels and Dirac Operators
Heat Kernels and Dirac Operators

Author: Nicole Berline

Publisher: Springer Science & Business Media

Published: 2003-12-08

Total Pages: 384

ISBN-13: 9783540200628

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In the first edition of this book, simple proofs of the Atiyah-Singer Index Theorem for Dirac operators on compact Riemannian manifolds and its generalizations (due to the authors and J.-M. Bismut) were presented, using an explicit geometric construction of the heat kernel of a generalized Dirac operator; the new edition makes this popular book available to students and researchers in an attractive paperback.

Heat Kernels and Spectral Theory
Heat Kernels and Spectral Theory

Author: E. B. Davies

Publisher: Cambridge University Press

Published: 1989

Total Pages: 212

ISBN-13: 9780521409971

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Heat Kernels and Spectral Theory investigates the theory of second-order elliptic operators.

Stochastic Geometric Analysis With Applications
Stochastic Geometric Analysis With Applications

Author: Ovidiu Calin

Publisher: World Scientific

Published: 2023-11-21

Total Pages: 557

ISBN-13: 981128329X

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This book is a comprehensive exploration of the interplay between Stochastic Analysis, Geometry, and Partial Differential Equations (PDEs). It aims to investigate the influence of geometry on diffusions induced by underlying structures, such as Riemannian or sub-Riemannian geometries, and examine the implications for solving problems in PDEs, mathematical finance, and related fields. The book aims to unify the relationships between PDEs, nonholonomic geometry, and stochastic processes, focusing on a specific condition shared by these areas known as the bracket-generating condition or Hörmander's condition. The main objectives of the book are:The intended audience for this book includes researchers and practitioners in mathematics, physics, and engineering, who are interested in stochastic techniques applied to geometry and PDEs, as well as their applications in mathematical finance and electrical circuits.

Analysis of Heat Equations on Domains. (LMS-31)
Analysis of Heat Equations on Domains. (LMS-31)

Author: El-Maati Ouhabaz

Publisher: Princeton University Press

Published: 2009-01-10

Total Pages: 296

ISBN-13: 1400826489

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This is the first comprehensive reference published on heat equations associated with non self-adjoint uniformly elliptic operators. The author provides introductory materials for those unfamiliar with the underlying mathematics and background needed to understand the properties of heat equations. He then treats Lp properties of solutions to a wide class of heat equations that have been developed over the last fifteen years. These primarily concern the interplay of heat equations in functional analysis, spectral theory and mathematical physics. This book addresses new developments and applications of Gaussian upper bounds to spectral theory. In particular, it shows how such bounds can be used in order to prove Lp estimates for heat, Schrödinger, and wave type equations. A significant part of the results have been proved during the last decade. The book will appeal to researchers in applied mathematics and functional analysis, and to graduate students who require an introductory text to sesquilinear form techniques, semigroups generated by second order elliptic operators in divergence form, heat kernel bounds, and their applications. It will also be of value to mathematical physicists. The author supplies readers with several references for the few standard results that are stated without proofs.

Perturbative and Non-perturbative Approaches to String Sigma-Models in AdS/CFT
Perturbative and Non-perturbative Approaches to String Sigma-Models in AdS/CFT

Author: Edoardo Vescovi

Publisher: Springer

Published: 2017-08-17

Total Pages: 246

ISBN-13: 3319634208

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This thesis introduces readers to the type II superstring theories in the AdS5×S5 and AdS4×CP3 backgrounds. Each chapter exemplifies a different computational approach to measuring observables (conformal dimensions of single-trace operators and expectation values of Wilson loop operators) relevant for two supersymmetric theories: the N=4 super Yang-Mills theory and the N=6 Chern-Simons-matter (ABJM) theory. Perturbative techniques have traditionally been used to make quantitative predictions in quantum field theories, but they are only reliable as long as the interaction strengths are weak. The anti-de Sitter/conformal field theory (AdS/CFT) correspondence realizes physicists’ dream of studying strongly coupled quantum field theories with “enhanced” symmetries, using the methods provided by string theory. The first part of the thesis sets up the semiclassical quantization of worldsheet sigma-model actions around string solutions of least area in AdS space. This machinery is used to capture quantum corrections at large coupling to next-to-leading and next-to-next-to-leading order by solving the determinants of partial differential operators and by computing Feynman diagrams, respectively. In turn, the second part presents an innovative approach based on Monte Carlo simulations to finite coupling for a lattice-discretized model of the AdS5×S5 superstring action. The thesis focuses on fundamental aspects, as well as on applications previously published by the author, and offers a valuable reference work for anyone interested in the most recent developments in this field.

The Ubiquitous Heat Kernel
The Ubiquitous Heat Kernel

Author: Jay Jorgenson

Publisher: American Mathematical Soc.

Published: 2006

Total Pages: 410

ISBN-13: 0821836986

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The aim of this volume is to bring together research ideas from various fields of mathematics which utilize the heat kernel or heat kernel techniques in their research. The intention of this collection of papers is to broaden productive communication across mathematical sub-disciplines and to provide a vehicle which would allow experts in one field to initiate research with individuals in another field, as well as to give non-experts a resource which can facilitate expanding theirresearch and connecting with others.

An Invitation to Hypoelliptic Operators and Hörmander's Vector Fields
An Invitation to Hypoelliptic Operators and Hörmander's Vector Fields

Author: Marco Bramanti

Publisher: Springer Science & Business Media

Published: 2013-11-20

Total Pages: 157

ISBN-13: 3319020870

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​Hörmander's operators are an important class of linear elliptic-parabolic degenerate partial differential operators with smooth coefficients, which have been intensively studied since the late 1960s and are still an active field of research. This text provides the reader with a general overview of the field, with its motivations and problems, some of its fundamental results, and some recent lines of development.