## Linear Operators: General theory |

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Page 19

The

The

**metric**topology in X is the smallest topology containing the spheres . The set X , with its**metric**topology , is called a**metric**space . If X is a topological space such that there exists a**metric**function whose topology is the same ...Page 20

A sequence { an } in a

A sequence { an } in a

**metric**space is a Cauchy sequence if limn . o ( am , an ) = 0. If every Cauchy sequence is convergent , a**metric**space is said to be complete . The next three lemmas are immediate consequences of the definitions .Page 91

admits an equivalent

admits an equivalent

**metric**under which it is complete , then G admits an invariant**metric**and is complete under each invariant**metric**. Thus every complete linear**metric**space can be metrized to be an F - space .### What people are saying - Write a review

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### Contents

B Topological Preliminaries | 10 |

quences | 26 |

Algebraic Preliminaries | 34 |

Copyright | |

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### Common terms and phrases

Acad algebra Amer analytic applied arbitrary assumed B-space Banach Banach spaces bounded called clear closed compact complex condition contains continuous functions converges convex Corollary countably additive defined DEFINITION denote dense determined differential disjoint Doklady Akad element equation equivalent everywhere Exercise exists extension field finite follows function defined function f given Hence Hilbert space implies inequality integral interval isomorphism Lebesgue Lemma limit linear functional linear operator linear space mapping Math meaning measure space metric neighborhood norm operator positive measure problem Proc Proof properties proved respect Russian satisfies scalar seen semi-group separable sequence set function Show shown sphere statement subset sufficient Suppose Theorem theory topological space topology transformations u-measurable uniform uniformly unique unit valued vector weak weakly compact zero