## Linear Operators: Spectral theory |

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Page 972

From the preceding lemma it is seen that ( t - x + p ) ( x ) = [ x , p ] r - lxe , Since characters have modulus

From the preceding lemma it is seen that ( t - x + p ) ( x ) = [ x , p ] r - lxe , Since characters have modulus

**equal**to unity , it follows from Planchere's theorem that { use + p ) } 2 = { u ( e ) } 2 . Hence if u ( e ) < oo , we have ...Page 1454

If T is a closed symmetric operator in Hilbert space , and T is bounded below , then ( a ) the essential spectrum of T is a subset of the real axis which is bounded below ; ( b ) the deficiency indices of T are

If T is a closed symmetric operator in Hilbert space , and T is bounded below , then ( a ) the essential spectrum of T is a subset of the real axis which is bounded below ; ( b ) the deficiency indices of T are

**equal**. PROOF .Page 1539

A6 Let T be a regular formally symmetric formal differential operator on [ 0 , 00 ) with

A6 Let T be a regular formally symmetric formal differential operator on [ 0 , 00 ) with

**equal**deficiency indices , and let 2 be a real number . Prove that the distance from a to the essential spectrum of t is less than or**equal**to K if ...### 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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