## Linear Operators: Spectral theory |

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Page 1180

(66) sup sy”(a) = |x|, a e B; w"e Ye and that in consequence Corollary 22 is valid

for functions f(r, s) with values in

generalizes, with hardly any change in its proof, to the space of functions f with

values in ...

(66) sup sy”(a) = |x|, a e B; w"e Ye and that in consequence Corollary 22 is valid

for functions f(r, s) with values in

**Hilbert space**. Therefore, Corollary 28generalizes, with hardly any change in its proof, to the space of functions f with

values in ...

Page 1262

28 Let a self adjoint operator A in a

there exists a

that Aa' = PQa', a e $), P denoting the orthogonal projection of $31 on Y). 29 Let ...

28 Let a self adjoint operator A in a

**Hilbert space**$) with 0 < A = I be given. Thenthere exists a

**Hilbert space**on D $5, and an orthogonal projection Q in Š), suchthat Aa' = PQa', a e $), P denoting the orthogonal projection of $31 on Y). 29 Let ...

Page 1773

APPENDIX

numbers, together with a complex function (-, -) defined on $5 ×{} with the

following properties: (i) (w, w) = 0 if and only if a = 0; (ii) (a, ar) > 0, a e Sy; (iii) (a +

y, ...

APPENDIX

**Hilbert space**is a linear vector space $5 over the field 4 of complexnumbers, together with a complex function (-, -) defined on $5 ×{} with the

following properties: (i) (w, w) = 0 if and only if a = 0; (ii) (a, ar) > 0, a e Sy; (iii) (a +

y, ...

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### Contents

SPECTRAL THEORY | 858 |

Bounded Normal Operators in Hilbert Space | 887 |

Miscellaneous Applications | 937 |

Copyright | |

34 other sections not shown

### Other editions - View all

Linear Operators, Part 1 Nelson Dunford,Jacob T. Schwartz,William G. Bade,Robert G. Bartle Snippet view - 1958 |

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additive Akad algebra Amer analytic applied assume Banach spaces basis belongs Borel boundary conditions boundary values bounded called clear closed closure coefficients compact complete Consequently constant contains continuous converges Corollary corresponding defined Definition denote dense determined domain eigenvalues element equal equation essential spectrum evident Exercise exists extension finite follows formal differential operator formula function function f given Hence Hilbert space identity independent indices inequality integral interval Lemma limit linear mapping Math measure multiplicity neighborhood norm obtained partial positive preceding present problem projection PRoof properties prove range regular remark representation respectively restriction result satisfies seen sequence singular solution spectral square-integrable statement subset subspace sufficiently Suppose symmetric Theorem theory topology transform unique vanishes vector zero