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希尔伯特空间导论 英文版2025|PDF|Epub|mobi|kindle电子书版本百度云盘下载
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- (英)勇著 著
- 出版社: 北京:世界图书北京出版公司
- ISBN:9787510042782
- 出版时间:2012
- 标注页数:239页
- 文件大小:40MB
- 文件页数:250页
- 主题词:希尔伯特空间-英文
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图书目录
Introduction1
1 Inner prodcut spaces4
1.1 Inner product spaces as metric spaces6
1.2 Problems11
2 Normed spaces13
2.1 Closed linear subspaces15
2.2 Problems18
3 Hilbert and Banach spaces21
3.1 The space L2(a,b)23
3.2 The closest point property26
3.3 Problems28
4 Orthogonal expansions31
4.1 Bessel's inequality34
4.2 Pointwise and L2 convergence35
4.3 Complete orthonormal sequences36
4.4 Orthogonal complements39
4.5 Problems42
5 Classical Fourier series45
5.1 The Fejér kernel46
5.2 Fejér's theorem52
5.3 Parseval's formula54
5.4 Weierstrass' approximation theorem54
5.5 Problems55
6 Dual spaces59
6.1 The Riesz-Fréchet theorem62
6.2 Problems64
7 Linear operators67
7.1 The Banach space ?(E,F)71
7.2 Inverses of operators72
7.3 Adioint operators75
7.4 Hermitian operators78
7.5 The spectrum80
7.6 Infinite matrices82
7.7 Problems83
8 Compact operators89
8.1 Hilbert-Schmidt operators92
8.2 The spectral theorem for compact Hermitian operators96
8.3 Problems102
9 Sturm-Liouville systems105
9.1 Small oscillations of a hanging chain105
9.2 Eigenfunctions and eigenvalues111
9.3 Orthogonality of eigenfunctions114
9.4 Problems115
10 Green's functions119
10.1 Compactness of the inverse of a Sturm-Liouville operator124
10.2 Problems128
11 Eigenfunction expansions131
11.1 Solution of the hanging chain problem134
11.2 Problems138
12 Positive operators and contractions141
12.1 Operator matrices144
12.2 M?bius transformations146
12.3 Completing matrix contractions149
12.4 Problems152
13 Hardy spaces157
13.1 Poisson's kernel161
13.2 Fatou's theorem164
13.3 Zero sets of H2 functions169
13.4 Multiplication operators and infinite Toeplitz and Hankel matrices171
13.5 Problems174
14 Interlude:complex analysis and operators in engineering177
15 Approximation by analytic fuctions187
15.1 The Nehari problem189
15.2 Hankel operators190
15.3 Solution of Nehari's problem196
15.4 Problems200
16 Approximation by meromorphic functions203
16.1 The singular values of an operator204
16.2 Schmidt pairs and singular vectors206
16.3 The Adamyan-Arov-Krein theorem210
16.4 Problems219
Appendix:square roots of positive operators221
References225
Answers to selected problems226
Afterword230
Index of notation236
Subject index238
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