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Gradient Inequalities

Gradient Inequalities
Author: Sen-Zhong Huang
Publisher: American Mathematical Soc.
Total Pages: 194
Release: 2006
Genre: Mathematics
ISBN: 0821840703

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This book presents a survey of the relatively new research field of gradient inequalities and their applications. The exposition emphasizes the powerful applications of gradient inequalities in studying asymptotic behavior and stability of gradient-like dynamical systems. It explains in-depth how gradient inequalities are established and how they can be used to prove convergence and stability of solutions to gradient-like systems. This book will serve as an introduction for furtherstudies of gradient inequalities and their applications in other fields, such as geometry and computer sciences. This book is written for advanced graduate students, researchers and applied mathematicians interested in dynamical systems and mathematical modeling.


Sobolev Gradients and Differential Equations

Sobolev Gradients and Differential Equations
Author: John Neuberger
Publisher: Springer Science & Business Media
Total Pages: 287
Release: 2009-12-01
Genre: Mathematics
ISBN: 3642040403

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A Sobolev gradient of a real-valued functional on a Hilbert space is a gradient of that functional taken relative to an underlying Sobolev norm. This book shows how descent methods using such gradients allow a unified treatment of a wide variety of problems in differential equations. For discrete versions of partial differential equations, corresponding Sobolev gradients are seen to be vastly more efficient than ordinary gradients. In fact, descent methods with these gradients generally scale linearly with the number of grid points, in sharp contrast with the use of ordinary gradients. Aside from the first edition of this work, this is the only known account of Sobolev gradients in book form. Most of the applications in this book have emerged since the first edition was published some twelve years ago. What remains of the first edition has been extensively revised. There are a number of plots of results from calculations and a sample MatLab code is included for a simple problem. Those working through a fair portion of the material have in the past been able to use the theory on their own applications and also gain an appreciation of the possibility of a rather comprehensive point of view on the subject of partial differential equations.


Łojasiewicz-Simon Gradient Inequalities for Coupled Yang-Mills Energy Functionals

Łojasiewicz-Simon Gradient Inequalities for Coupled Yang-Mills Energy Functionals
Author: Paul M Feehan
Publisher: American Mathematical Society
Total Pages: 138
Release: 2021-02-10
Genre: Mathematics
ISBN: 1470443023

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The authors' primary goal in this monograph is to prove Łojasiewicz-Simon gradient inequalities for coupled Yang-Mills energy functions using Sobolev spaces that impose minimal regularity requirements on pairs of connections and sections.


Geometric Analysis of Quasilinear Inequalities on Complete Manifolds

Geometric Analysis of Quasilinear Inequalities on Complete Manifolds
Author: Bruno Bianchini
Publisher: Springer Nature
Total Pages: 291
Release: 2021-01-18
Genre: Mathematics
ISBN: 3030627047

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This book demonstrates the influence of geometry on the qualitative behaviour of solutions of quasilinear PDEs on Riemannian manifolds. Motivated by examples arising, among others, from the theory of submanifolds, the authors study classes of coercive elliptic differential inequalities on domains of a manifold M with very general nonlinearities depending on the variable x, on the solution u and on its gradient. The book highlights the mean curvature operator and its variants, and investigates the validity of strong maximum principles, compact support principles and Liouville type theorems. In particular, it identifies sharp thresholds involving curvatures or volume growth of geodesic balls in M to guarantee the above properties under appropriate Keller-Osserman type conditions, which are investigated in detail throughout the book, and discusses the geometric reasons behind the existence of such thresholds. Further, the book also provides a unified review of recent results in the literature, and creates a bridge with geometry by studying the validity of weak and strong maximum principles at infinity, in the spirit of Omori-Yau’s Hessian and Laplacian principles and subsequent improvements.


Zeroing Dynamics, Gradient Dynamics, and Newton Iterations

Zeroing Dynamics, Gradient Dynamics, and Newton Iterations
Author: Yunong Zhang
Publisher: CRC Press
Total Pages: 310
Release: 2018-10-09
Genre: Mathematics
ISBN: 1498753787

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Neural networks and neural dynamics are powerful approaches for the online solution of mathematical problems arising in many areas of science, engineering, and business. Compared with conventional gradient neural networks that only deal with static problems of constant coefficient matrices and vectors, the authors’ new method called zeroing dynamics solves time-varying problems. Zeroing Dynamics, Gradient Dynamics, and Newton Iterations is the first book that shows how to accurately and efficiently solve time-varying problems in real-time or online using continuous- or discrete-time zeroing dynamics. The book brings together research in the developing fields of neural networks, neural dynamics, computer mathematics, numerical algorithms, time-varying computation and optimization, simulation and modeling, analog and digital hardware, and fractals. The authors provide a comprehensive treatment of the theory of both static and dynamic neural networks. Readers will discover how novel theoretical results have been successfully applied to many practical problems. The authors develop, analyze, model, simulate, and compare zeroing dynamics models for the online solution of numerous time-varying problems, such as root finding, nonlinear equation solving, matrix inversion, matrix square root finding, quadratic optimization, and inequality solving.


Topics in Applied Analysis and Optimisation

Topics in Applied Analysis and Optimisation
Author: Michael Hintermüller
Publisher: Springer Nature
Total Pages: 396
Release: 2019-11-27
Genre: Mathematics
ISBN: 3030331164

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This volume comprises selected, revised papers from the Joint CIM-WIAS Workshop, TAAO 2017, held in Lisbon, Portugal, in December 2017. The workshop brought together experts from research groups at the Weierstrass Institute in Berlin and mathematics centres in Portugal to present and discuss current scientific topics and to promote existing and future collaborations. The papers include the following topics: PDEs with applications to material sciences, thermodynamics and laser dynamics, scientific computing, nonlinear optimization and stochastic analysis.


Inequalities in Respiratory Health

Inequalities in Respiratory Health
Author: Ian P. Sinha
Publisher: European Respiratory Society
Total Pages: 264
Release: 2023-03-01
Genre: Medical
ISBN: 1849841586

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Health inequalities have long been deeply engrained in society. If we are to address these inequalities, we need to reflect on what has driven them, and critically review the approaches that do and do not work. This Monograph brings together leading experts and up-and-coming researchers, in a collection of state-of-the-art articles, discussing the drivers and consequences of respiratory inequality.


Inequalities in Health

Inequalities in Health
Author: Nir Eyal
Publisher: Oxford University Press, USA
Total Pages: 348
Release: 2013-10
Genre: Business & Economics
ISBN: 0199931399

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Which inequalities in longevity and health among individuals, groups, and nations are unfair? And what priority should health policy attach to narrowing them? These essays by philosophers, economists, epidemiologists, and physicians attempt to determine how health inequalities should be conceptualized, measured, ranked, and evaluated.


Functional Inequalities Markov Semigroups and Spectral Theory

Functional Inequalities Markov Semigroups and Spectral Theory
Author: Fengyu Wang
Publisher: Elsevier
Total Pages: 391
Release: 2006-04-06
Genre: Mathematics
ISBN: 0080532071

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In this book, the functional inequalities are introduced to describe:(i) the spectrum of the generator: the essential and discrete spectrums, high order eigenvalues, the principle eigenvalue, and the spectral gap;(ii) the semigroup properties: the uniform intergrability, the compactness, the convergence rate, and the existence of density;(iii) the reference measure and the intrinsic metric: the concentration, the isoperimetic inequality, and the transportation cost inequality.


Sobolev Inequalities, Heat Kernels under Ricci Flow, and the Poincare Conjecture

Sobolev Inequalities, Heat Kernels under Ricci Flow, and the Poincare Conjecture
Author: Qi S. Zhang
Publisher: CRC Press
Total Pages: 434
Release: 2010-07-02
Genre: Mathematics
ISBN: 1439834601

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Focusing on Sobolev inequalities and their applications to analysis on manifolds and Ricci flow, Sobolev Inequalities, Heat Kernels under Ricci Flow, and the Poincare Conjecture introduces the field of analysis on Riemann manifolds and uses the tools of Sobolev imbedding and heat kernel estimates to study Ricci flows, especially with surgeries. The