هندسه دیسکریت دیفرانسیل (مطالعات تحصیلات تکمیلی در ریاضیات، جلد ۹۸)

perhaps Uniquely Among Mathematical Topics, Complex Analysis Presents The Student With The Opportunity To Learn A Thoroughly Developed Subject That Is Rich In Both Theory And Applications. Even In An Introductory Course, The Theorems And Techniques Can Have Elegant Formulations. But For Any Of These Profound Results, The Student Is Often Left Asking: What Does It Really Mean? Where Does It Come From? In Complex Made Simple, David Ullrich Shows The Student How To Think Like An Analyst. In Many Cases, Results Are Discovered Or Derived, With An Explanation Of How The Students Might Have Found The Theorem On Their Own. Ullrich Explains Why A Proof Works. He Will Also, Sometimes, Explain Why A Tempting Idea Does Not Work. Complex Made Simple Looks At The Dirichlet Problem For Harmonic Functions Twice: Once Using The Poisson Integral For The Unit Disk And Again In An Informal Section On Brownian Motion, Where The Reader Can Understand Intuitively How The Dirichlet Problem Works For General Domains. Ullrich Also Takes Considerable Care To Discuss The Modular Group, Modular Function, And Covering Maps, Which Become Important Ingredients In His Modern Treatment Of The Often-overlooked Original Proof Of The Big Picard Theorem. This Book Is Suitable For A First-year Course In Complex Analysis. The Exposition Is Aimed Directly At The Students, With Plenty Of Details Included. The Prerequisite Is A Good Course In Advanced Calculus Or Undergraduate Analysis.

An emerging field of discrete differential geometry aims at the development of discrete equivalents of notions and methods of classical differential geometry. The latter appears as a limit of a refinement of the discretization. Current interest in discrete differential geometry derives not only from its importance in pure mathematics but also from its applications in computer graphics, theoretical physics, architecture, and numerics. Rather unexpectedly, the very basic structures of discrete differential geometry turn out to be related to the theory of integrable systems. One of the main goals of this book is to reveal this integrable structure of discrete differential geometry. For a given smooth geometry one can suggest many different discretizations. Which one is the best? This book answers this question by providing fundamental discretization principles and applying them to numerous concrete problems. It turns out that intelligent theoretical discretizations are distinguished also by their good performance in applications. The intended audience of this book is threefold. It is a textbook on discrete differential geometry and integrable systems suitable for a one semester graduate course. On the other hand, it is addressed to specialists in geometry and mathematical physics. It reflects the recent progress in discrete differential geometry and contains many original results. The third group of readers at which this book is targeted is formed by specialists in geometry processing, computer graphics, architectural design, numerical simulations, and animation. They may find here answers to the question ''How do we discretize differential geometry?'' arising in their specific field. Prerequisites for reading this book include standard undergraduate background (calculus and linear algebra). No knowledge of differential geometry is expected, although some familiarity with curves and surfaces can be helpful.

"An emerging field of discrete differential geometry aims at the development of discrete equivalents of notions and methods of classical differential geometry. The latter appears as a limit of a refinement of the discretization. Current interest in discrete differential geometry derives not only from its importance in pure mathematics but also from its applications in computer graphics, theoretical physics, architecture, and numerics. Rather unexpectedly, the very basic structures of discrete differential geometry turn out to be related to the theory of Integrable systems. One of the main goals of this book Is to reveal this integrable structure of discrete differential geometry." "The intended audience of this book is threefold. It is a textbook on discrete differential geometry and integrable systems suitable for a one semester graduate course. On the other hand, it is addressed to specialists in geometry and mathematical physics. It reflects the recent progress in discrete differential geometry and contains many original results. The third group of readers at which this book is targeted is formed by specialists in geometry processing, computer graphics, architectural design, numerical simulations, and animation. They may find here answers to the question "How do we discretize differential geometry?" arising in their specific field."--Jacket.