## Linear Operators: Spectral theory |

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Page 978

**Closure**Theorems +7 ) As in the preceding section the letter R will stand for a nondiscrete locally compact Abelian group and integration will always be performed with respect to a Haar measure on the group .Page 993

Now let V , be an arbitrary open subset of Ř with compact

Now let V , be an arbitrary open subset of Ř with compact

**closure**. Then it follows from what has just been demonstrated that av , Ayur , Qy , i.e. , Oy is independent of V. Q.E.D. - 16 THEOREM . If the bounded measurable function 9 has ...Page 1226

The minimal closed symmetric extension of a symmetric operator T with dense domain is called its

The minimal closed symmetric extension of a symmetric operator T with dense domain is called its

**closure**, and written T. 8 LEMMA . ( a ) The**closure**T of T is the restriction of T * to the**closure**of D ( T ) in the Hilbert space D ( T ...### What people are saying - Write a review

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### Contents

BAlgebras | 859 |

Miscellaneous Applications | 937 |

Compact Groups | 945 |

Copyright | |

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additive adjoint operator algebra Amer analytic assume Banach spaces basis belongs Borel boundary conditions boundary values bounded called clear closed closure coefficients compact complex 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 matrix 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