变分法（第4版） [Variational Methods: Applications to Nonlinear Partial Differential Equations and Hamilton 下载 mobi epub pdf 电子书 2024

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　　 《变分法（第4版）》是《变分法》第四版，主要讲述在非线性偏微分方程和哈密顿系统中的应用，继第一版出版十八年再次全新呈现。整《变分法（第4版）》都做了大量的修改，仅500多条参考书目就将其价值大大提升。第四版中主要讲述变分微积分，增加了该领域的新进展。这也是一部变分法学习的教程，特别讲述了yamabe流的收敛和胀开现象以及新研究发现的调和映射和曲面中热流的向后小泡形成。

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目录

Chapter I.the direct methods in the calculus of variations
1.lower semi-continuity
degenerate elliptic equations
-minimal partitioning hypersurfaces
-minimal hypersurfaces in riemannian manifolds
-a general lower semi-continuity result
2.constraints
semilinear elliptic boundary value problems
-perron's method in a variational guise
-the classical plateau problem
3.compensated compactness
applications in elasticity
-convergence results for nonlinear elliptic equations
-hardy space methods
4.the concentration-compactness principle
existence of extremal functions for sobolev embeddings
5.ekeland's variational principle
existence of minimizers for quasi-convex functionals
6.duality
hamiltonian systems
-periodic solutions of nonlinear wave equations
7.minimization problems depending on parameters
harmonic maps with singularities

Chapter Ⅱ.minimax methods
1.the finite dimensional case
2.the palais-smale condition
3.a general deformation lemma
pseudo-gradient flows on banach spaces
-pseudo-gradient flows on manifolds
4.the minimax principle
closed geodesics on spheres
5.index theory
krasnoselskii genus
-minimax principles for even functional
-applications to semilinear elliptic problems
-general index theories
-ljusternik-schnirelman category
-a geometrical si-index
-multiple periodic orbits of hamiltonian systems
6.the mountain pass lemma and its variants
applications to semilinear elliptic boundary value problems
-the symmetric mountain pass lemma
-application to semilinear equa- tions with symmetry
7.perturbation theory
applications to semilinear elliptic equations
8.linking
applications to semilinear elliptic equations
-applications to hamil- tonian systems
9.parameter dependence
10.critical points of mountain pass type
multiple solutions of coercive elliptic problems
11.non-differentiable fhnctionals
12.ljnsternik-schnirelman theory on convex sets
applications to semilinear elliptic boundary value problems

Chapter Ⅲ.Limit cases of the palais-smale condition
1.pohozaev's non-existence result
2.the brezis-nirenberg result
constrained minimization
-the unconstrained case： local compact- ness
-multiple solutions
3.the effect of topology
a global compactness result, 184 -positive solutions on annular-shaped regions, 190
4.the yamabe problem
the variational approach
-the locally conformally flat case
-the yamabe flow
-the proof of theorem4.9 （following ye [1]）
-convergence of the yamabe flow in the general case
-the compact case ucc
-bubbling： the casu
5.the dirichlet problem for the equation of constant mean curvature
small solutions
-the volume functional
- wente's uniqueness result
-local compactness
-large solutions
6.harmonic maps of riemannian surfaces
the euler-lagrange equations for harmonic maps
-bochner identity
-the homotopy problem and its functional analytic setting
-existence and non-existence results
-the heat flow for harmonic maps
-the global existence result
-the proof of theorem 6.6
-finite-time blow-up
-reverse bubbling and nonuniqueness

appendix a
sobolev spaces
-hslder spaces
-imbedding theorems
-density theorem
-trace and extension theorems
-poincar4 inequality
appendix b
schauder estimates
-lp-theory
-weak solutions
-areg-ularityresult
-maximum principle
-weak maximum principle
-application
appendix c
frechet differentiability
-natural growth conditions
references
index

精彩书摘

Almost twenty years after conception of the first edition， it was a challenge to prepare an updated version of this text on the Calculus of Variations. The field has truely advanced dramatically since that time， to an extent that I find it impossible to give a comprehensive account of all the many important developments that have occurred since the last edition appeared. Fortunately， an excellent overview of the most significant results， with a focus on functional analytic and Morse theoretical aspects of the Calculus of Variations， can be found in the recent survey paper by Ekeland-Ghoussoub [1]. I therefore haveonly added new material directly related to the themes originally covered.
Even with this restriction， a selection had to be made. In view of the fact that flow methods are emerging as the natural tool for studying variational problems in the field of Geometric Analysis， an emphasis was placed on advances in this domain. In particular， the present edition includes the proof for the convergence of the Yamabe flow on an arbitrary closed manifold of dimension 3 m 5 for initial data allowing at most single-point blow-up.Moreover， we give a detailed treatment of the phenomenon of blow-up and discuss the newly discovered results for backward bubbling in the heat flow for harmonic maps of surfaces.
Aside from these more significant additions， a number of smaller changes have been made throughout the text， thereby taking care not to spoil the freshness of the original presentation. References have been updated， whenever possible， and several mistakes that had survived the past revisions have now been eliminated. I would like to thank Silvia Cingolani， Irene Fouseca， Emmanuel Hebey， and Maximilian Schultz for helpful comments in this regard. Moreover，I am indebted to Gilles Angelsberg， Ruben Jakob， Reto Miiller， and Melanie Rupfiin， for carefully proof-reading the new material.
……

前言/序言

变分法（第4版） [Variational Methods: Applications to Nonlinear Partial Differential Equations and Hamilton 下载 mobi epub pdf txt 电子书 格式

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专业书，印刷质量可以接受，影印版

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真的还可以，大神们的书，电子版看得累人。

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方程必看之书，好好研究

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真的还可以，大神们的书，电子版看得累人。

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同样的材料可以出现在不同的标题中，例如希尔伯特空间技术，摩尔斯理论，或者辛几何。变分一词用于所有极值泛函问题。微分几何中的测地线的研究是很显然的变分性质的领域。极小曲面（肥皂泡）上也有很多研究工作，称为Plateau问题。变分法可能是从Johann Bernoulli(1696)提出最速曲线(brachistochrone curve)问题开始出现的. 它立即引起了Jakob Bernoulli和Marquis de l'Hôpital的注意, 但Leonhard Euler首先详尽的阐述了这个问题. 他的贡献始于1733年, 他的《变分原理》(Elementa Calculi Variationum)寄予了这门科学这个名字. Lagrange对这个理论的贡献非常大. Legendre(1786)确定了一种方法, 但在对极大和极小的区别不完全令人满意. Isaac Newton和Gottfried Leibniz也是在早期关注这一学科. 对于这两者的区别Vincenzo Brunacci(1810), Carl Friedrich Gauss(1829), Simeon Poisson(1831), Mikhail Ostrogradsky(1884), 和Carl Jacobi(1837)都曾做出过贡献. Sarrus(1842)的由Cauchy(1844)浓缩和修改的是一个重要的具有一般性的成就. Strauch(1849), Jellett(1850), Otto Hesse(1857), Alfred Clebsch(1858), 和Carll(1885)写了一些其他有价值的论文和研究报告, 但可能那个世纪最重要的成果是Weierstrass所取得的. 他关于这个理论的著名教材是划时代的, 并且他可能是第一个将变分法置于一个稳固而不容置疑的基础上的. 1900发表的第20和23个希尔伯特(Hilbert)促进了更深远的发展.

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很好，趁活动买的。

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还不错的说，值得看哦

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书不错，挺好的，我很满意。

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