☆☆☆☆☆
简体网页||繁体网页



点击这里下载

类似图书 点击查看全场最低价

---

内容简介

　　This book is a sequel to Symmetries and Integration Methods (2002), by George W. Bluman and Stephen C. Anco. It includes a significant update of the material in the last three chapters of Symmet'ries an,d Dzjjerential Equa-tions (1989; reprinted with corrections, 1996), by George W. Bluman and Sukeyuki Kumei. The emphasis in the present book is on how to find sys-tematically symmetries (local and nonlocal) and conservation laws (local and nonlocal) of a given PDE system and how to use systematically symmetries and conservation laws for related applications. In particular, for a given PDE system, it is shown how systematically (1) to find higher-order and nonlocal symmetries of the system; (2) to construct by direct methods its conserva- tion laws through finding sets of conservation law multipliers and formulas to obtain the fluxes of a conservation law from a known set of multipliers; (3) to determine whether it has a linearization by an invertible mapping and con- struct such a linearization when one exists from knowledge of its symmetries andlor conservation law multipliers, in the case wheii the given PDE system is nonlinear; (4) to use conservation laws to construct equivalent nonlocally related systems; (5) to use such nonlocally related systems to obtain nonlo- cal symmetries, nonlocal conservation laws and non-invertible mappings to linear systems; and (6) to construct specific solutions from reductions arising from its symmetries as well as from extensions of symmetry methods to find such reductions.
　　This book is aimed at applied mathematicians; scientists and engineers interested in finding solutions of partial differential equations and is written in the style of the above-mentioned 1989 book by Bluman and Kumei. There are numerous examples involving various well-known physical and engineering PDE systems.

内页插图

目录

Preface
Introduction
1 Local Transformations and Conservation Laws
1.1 Introduction
1.2 Local Transformations
1.2.1 Point transformations
1.2.2 Contact transformations
1.2.3 Higher-order transformations
1.2.4 One-parameter higher-order transformations
1.2.5 Point symmetries
1.2.6 Contact and higher-order symmetries
1.2.7 Equivalence transformations and symmetry classification
1.2.8 Recursion operators for local symmetries
1.3 Conservation Laws
1.3.1 Local conservation laws
1.3.2 Equivalent conservation laws
1.3.3 Multipliers for conservation laws.Euler operators
1.3.4 The direct method for construction of conservation laws.Cauchy-Kovalevskaya form
1.3.5 Examples
1.3.6 Linearizing operators and adjoint equations
1.3.7 Determination of fluxes of conservation laws from multipliers
1.3.8 Self-adjoint PDE systems
1.4 Noether's Theorem
1.4.1 Euler-Lagrange equations
1.4.2 Noether's formulation of Noether's theorem
1.4.3 Boyer's formulation of Noether's theorem
1.4.4 Limitations of Noether's theorem
1.4.5 Examples
1.5 Some Connections Between Symmetries and Conservation Laws
1.5.1 Use of symmetries to find new conservation laws from known conservation laws
1.5.2 Relationships among symmetries，solutions of adjoint equations，and conservation laws
1.6 Discussion

2 Construction of Mappings Relating Differential Equations
2.1 Introduction
2.2 Notations； Mappings of Infinitesimal Generators
2.2.1 Theorems on invertible mappings
2.3 Mapping of a Given PDE to a Specific Target PDE
2.3.1 Construction of non-invertible mappings
2.3.2 Construction of an invertible mapping by a point transformation
2.4 Invertible Mappings of Nonlinear PDEs to Linear PDEs Through Symmetries
2.4.1 Invertible mappings of nonlinear PDE systems（with at least two dependent variables）to linear PDE systems
2.4.2 Invertible mappings of nonlinear PDE systems（with one dependent variable）to linear PDE systems
2.5 Invertible Mappings of Linear PDEs to Linear PDEs with Constant Coefficients
2.5.1 Examples of mapping variable coefficient linear PDEs to constant coefficient linear PDEs through invertible point transformations
2.5.2 Example of finding the most general mapping of a given constant coefficient linear PDE to some constant coefficient linear PDE
2.6 Invertible Mappings of Nonlinear PDEs to Linear PDEs Through Conservation Law Multipliers
2.6.1 Computational steps
2.6.2 Examples of linearizations of nonlinear PDEs through conservation law multipliers
2.7 Discussion

3 Nonlocally Related PDE Systems
3.1 Introduction
3.2 Nonlocally Related Potential Systems and Subsystems in Two Dimensions
3.2.1 Potential systems
3.2.2 Nonlocally related subsystems
3.3 Trees of Nonlocally Related PDE Systems
3.3.1 Basic procedure of tree construction
3.3.2 A tree for a nonlinear diffusion equation
3.3.3 A tree for planar gas dynamics（PGD）equations
3.4 Nonlocal Conservation Laws
3.4.1 Conservation laws arising from nonlocally related systems
3.4.2 Nonlocal conservation laws for diffusion-convection equations
3.4.3 Additional conservation laws of nonlinear telegraph equations
3.5 Extended Tree Construction Procedure
3.5.1 An extended tree construction procedure
3.5.2 An extended tree for a nonlinear diffusion equation
3.5.3 An extended tree for a nonlinear wave equation
3.5.4 An extended tree for the planar gas dynamics equations
3.6 Discussion

4 Applications of Nonlocally Related PDE Systems
4.1 Introduction
4.2 Nonlocal Symmetries
4.2.1 Nonlocal symmetries of a nonlinear diffusion equation
4.2.2 NonlocAL symmetries of a nonlinear wave equation
4.2.3 Classification of nonlocal symmetries of nonlinear telegraph equations arising from point symmetries of potential systems
4.2.4 Nonlocal symmetries of nonlinear telegraph equations with power law nonlinearities
4.2.5 Nonlocal symmetries of the planar gas dynamics equations
4.3 Construction of Non-invertible Mappings Relating PDEs
4.3.1 Non-invertible mappings of nonlinear PDE systems to linear PDE systems
4.3.2 Non-invertible mappings of linear PDEs with variable coefficients to linear PDEs with constant coefficients.
4.4 Discussion

5 Further Applications of Symmetry Methods： Miscellaneous Extensions
5.1 Introduction
5.2 Applications of Symmetry Methods to the Construction of Solutions of PDEs
5.2.1 The classical method
5.2.2 The nonclassical method
5.2.3 Invariant solutions arising from nonlocal symmetries that are local symmetries of nonlocally related systems
5.2.4 Futrther extensions of symmetry methods for construction of solutions of PDEs connected with nonlocaUy related systems
5.3 Nonlocally Related PDE Systems in Three or More Dimensions
5.3.1 Divergence-type conservation laws and resulting potential systems
5.3.2 Nonlocally related subsystems
5.3.3 Tree construction，nonlocal conservation laws，and nonlocal symmetries
5.3.4 Lower-degree conservation laws and related potential systems
5.3.5 Examples of applications of nonlocally related systems in higher dimensions
5.3.6 Symmetries and exact solutions of the three-dimensional MHD equilibrium equations
5.4 Symbolic Software
5.4.1 An example of symbolic computation of point symmetries
5.4.2 An example of point symmetry classification
5.4.3 An example of symbolic computation of conservation laws
5.5 Discussion
References
Theorem，Corollary and Lemma Index
Author Index
Subject Index

前言/序言

对称方法在偏微分方程中的应用 [Applications of Symmetry Methods to Partial Differential Equations] 电子书 下载 mobi epub pdf txt

评分☆☆☆☆☆

买书。。。…。。。你要不要过来吗我困了，…。，…………。。。。。。。。

评分☆☆☆☆☆

好书好书好书好书好书好书好书好书好书好书好书好书好书好书好书好书好书好书好书好书好书好书好书好书

评分☆☆☆☆☆

经典图书很好

评分☆☆☆☆☆

京东上的东西我觉得非常好，我的所有东西都在京东上面买的，送货速度非常快，买了东西就知道什么时候来，我在京东买东西好多年了，京东的东西都是正品，售后服务特别好，我太喜欢了！这次买的东西还是一如继往的好，买了我就迫不及待的打开，确实很不错，我真是太喜欢了。在京东消费很多，都成钻石会员了，哈哈，以后还会买，所有的东西都在京东买，京东商城是生活首选！

评分☆☆☆☆☆

杜甫的思想核心是儒家的仁政思想。他有（致君尧舜上，再使风俗淳）的宏伟抱负。他热爱生活，热爱人民，热爱祖国的太好河山。他嫉恶如仇，对朝廷的腐败、社会生活中的黑暗现象都给予批评和揭露。他同情人民，甚至幻想着为解救人民的苦难甘愿做自我牺牲。杜甫是伟大的现实主义诗人，一生写诗一千四百多首。它深刻地反映了唐代安史之乱前后20多年的社会全貌，生动地记载了杜甫一生的生活经历，把社会现实与个人生活紧密结合，达到思想内容与艺术形式的完美统一，代表了唐代诗歌的最高成就。他的诗集被后代称作（诗史）。

评分☆☆☆☆☆

很好很适合学生老师阅读

评分☆☆☆☆☆

东西不错。。。。。。。。。。。

评分☆☆☆☆☆

求解微分方程时，考虑方程的对称性通常是很重要的一个环节

评分☆☆☆☆☆

买书。。。…。。。你要不要过来吗我困了，…。，…………。。。。。。。。

类似图书 点击查看全场最低价