## Linear Operators: Spectral operators |

### From inside the book

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Gohberg, I. C, and Iohvidov, I. S.) 8. On the trace formula in perturbation theory.

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**Math**. Lit., Moscow, 1962. Krein, M. G. (see also Birman, M. §., Brodskil, M. S.,Gohberg, I. C, and Iohvidov, I. S.) 8. On the trace formula in perturbation theory.

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**Math**. Rev. 15, 720 (1954).22.

Page 2567

Studia

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Studia

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**Math**. 18, 187-189 (1959). 6.

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### Contents

SPECTRAL OPERATORS | 1924 |

Spectral Operators | 1925 |

Terminology and Preliminary Notions | 1928 |

Copyright | |

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### Common terms and phrases

adjoint operator algebra of projections Amer analytic arbitrary asymptotic B-space Banach space Boolean algebra Borel sets boundary conditions bounded Borel function bounded linear operator bounded operator bounded spectral commuting compact complex numbers complex plane constant contains continuous functions converges Corollary countably additive Definition denote differential operator disjoint Doklady Akad domain eigenvalues elements equation equivalent exists finite number Foias follows from Lemma follows from Theorem formal differential operator formula Hence Hilbert space hypothesis identity inequality inverse Lebesgue Math matrix multiplicity Nauk SSSR norm operators in Hilbert perturbation polynomial preceding Proof properties prove quasi-nilpotent restriction Russian satisfies scalar operator scalar type operator scalar type spectral Section semi-group sequence shows spectral measure spectral operator spectral theory spectrum strong operator topology subset Suppose trace class type spectral operator unbounded uniformly bounded unique vector weakly complete zero