## Linear Operators: Spectral operators |

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Page 1130

[gi(s), ge(s), ...], where co (*1 3.0)=X | K,(s,t)f,(t)dt, the series converging

unconditionally in the topology of Le. Conversely, if Ku is any family of

satisfying (i), ..., (iv), then (v) defines a Hilbert-Schmidt operator in §o with norm

given by (iv).

[gi(s), ge(s), ...], where co (*1 3.0)=X | K,(s,t)f,(t)dt, the series converging

unconditionally in the topology of Le. Conversely, if Ku is any family of

**kernels**satisfying (i), ..., (iv), then (v) defines a Hilbert-Schmidt operator in §o with norm

given by (iv).

Page 1590

For a detailed exposition of the problems connected with the calculation of the

Green's

Mohr [1] may be found valuable, Section 4. The work of Hilbert [1] in 1904 already

...

For a detailed exposition of the problems connected with the calculation of the

Green's

**kernel**for a differential operator on a finite interval, the recent paper of E.Mohr [1] may be found valuable, Section 4. The work of Hilbert [1] in 1904 already

...

Page 1624

Their first step consists in obtaining an expression for f(t, 2) as a “linear

combination” of the functions cost V2 in terms of an integral operator with a

of Volterra type: (#) f(t, 2) = costv/2 + J. K. (t. s) cos svāds. Let us indicate briefly

how the ...

Their first step consists in obtaining an expression for f(t, 2) as a “linear

combination” of the functions cost V2 in terms of an integral operator with a

**kernel**of Volterra type: (#) f(t, 2) = costv/2 + J. K. (t. s) cos svāds. Let us indicate briefly

how the ...

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### Contents

BAlgebras | 859 |

Commutative BAlgebras | 868 |

4 Exercises | 879 |

Copyright | |

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### Other editions - View all

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

### Common terms and phrases

adjoint extension adjoint operator algebra analytic B-algebra B-space Borel set boundary conditions boundary values bounded operator closed closure Cº(I coefficients compact operator complex numbers constant continuous function converges Corollary deficiency indices Definition denote dense domain eigenfunctions eigenvalues element equation essential spectrum Exercise exists finite dimensional follows from Lemma follows from Theorem follows immediately formal differential operator formally self adjoint formula Fourier function defined function f Hence Hilbert space Hilbert-Schmidt operator identity inequality infinity integral interval kernel Lemma Let f Let Q linearly independent mapping matrix measure neighborhood non-zero norm open set operators in Hilbert orthogonal orthonormal basis Plancherel's theorem positive preceding lemma prove real numbers satisfies sequence singular ſº solution spectral spectral theorem square-integrable subspace Suppose symmetric operator theory To(r To(t topology transform uniformly unique unitary vanishes vector zero