## Linear Operators: Spectral theory |

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Page 1297

Q.E.D. We now turn to a discussion of the specific form assumed in the present

case by the abstract “

see that the discussion leads us to a number of results about deficiency indices.

Q.E.D. We now turn to a discussion of the specific form assumed in the present

case by the abstract “

**boundary values**” introduced in the last chapter. We shallsee that the discussion leads us to a number of results about deficiency indices.

Page 1298

If t is formally self adjoint, then Definition 17 of a

with Definition XII.4.20 of a

theorem gives a basic property of

the ...

If t is formally self adjoint, then Definition 17 of a

**boundary value**for t coincideswith Definition XII.4.20 of a

**boundary value**for To(t). PRoof. ... Q.E.D. The nexttheorem gives a basic property of

**boundary values**of differential operators. Forthe ...

Page 1307

D2 are

)ID2(g)–D2(f) D1(g), f, ge 3 (Ti(r)). PRoof. Let A be any

**boundary values**C1, C2, D1, D, where C1, C2 are**boundary values**at a and D1,D2 are

**boundary values**at b, such that (tf, g)–(f, ty) = C, (f)C2(g)–C2(f)C1(g) +D1(f)ID2(g)–D2(f) D1(g), f, ge 3 (Ti(r)). PRoof. Let A be any

**boundary value**for t.### What people are saying - Write a review

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### Contents

BAlgebras | 859 |

Commutative BAlgebras | 868 |

Commutative BAlgebras | 874 |

Copyright | |

48 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 |

### Common terms and phrases

additive adjoint adjoint operator algebra analytic assume B-algebra basis belongs Borel set boundary conditions boundary values bounded called clear closed closure coefficients commutative compact complex Consequently consider constant contains converges Corollary corresponding defined Definition denote dense determined domain eigenvalues element equal equation essential spectrum evident Exercise exists extension fact finite follows formal differential operator formula function function f given Hence Hilbert space ideal identity independent indices inequality integral interval isometric isomorphism Lemma linear mapping matrix measure multiplicity neighborhood norm normal operator obtained positive preceding present projection proof properties prove range regular representation respectively restriction result satisfies seen sequence shown singular solution spectral square-integrable statement subset subspace sufficiently Suppose symmetric Theorem theory topology transform unique unit vanishes vector zero