## Linear Operators: Part III: Spectral Operators [by] Nelson Dunford and Jacob T. Schwartz, with the Assistance of William G. Bade and Robert G. Bartle, Volume 1 |

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Page 2307

The last example above illustrates a problem which will be of great concern to us in the remainder of this chapter : the problem of finding which formal differential operators and sets of

The last example above illustrates a problem which will be of great concern to us in the remainder of this chapter : the problem of finding which formal differential operators and sets of

**boundary conditions**lead to spectral operators .Page 2350

But , under the condition that the set of

But , under the condition that the set of

**boundary conditions**Ci ( Uf ) = 0 is regular , this has been established above . Thus , to complete the proof , it suffices to show that the set of**boundary conditions**Ci ( Uf ) = 0 , i = 1 ...Page 2517

13 , 617-634 ( 1964 ) . Birkhoff , G. 9. Note on positive linear operators . Proc . Amer . Math . Soc . 16 , 14-16 ( 1965 ) . Birkhoff , G. D. 3.

13 , 617-634 ( 1964 ) . Birkhoff , G. 9. Note on positive linear operators . Proc . Amer . Math . Soc . 16 , 14-16 ( 1965 ) . Birkhoff , G. D. 3.

**Boundary value**and expansion problems of ordinary linear differential equations . Trans .### What people are saying - Write a review

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### Contents

SPECTRAL OPERATORS | 1924 |

Introduction | 1927 |

Terminology and Preliminary Notions | 1929 |

Copyright | |

28 other sections not shown

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adjoint operator Amer analytic apply arbitrary assumed B-space Banach space belongs Boolean algebra Borel set boundary conditions bounded bounded operator Chapter clear closed commuting compact complex constant contains continuous converges Corollary corresponding countably additive defined Definition denote dense determined differential operator domain elements equation equivalent established exists extension fact finite follows formal formula given gives Hence Hilbert space hypothesis identity inequality integral invariant inverse Lemma limit linear operator Math Moreover multiplicity norm perturbation plane positive preceding present problem projections PROOF properties prove range resolution resolvent restriction Russian satisfies scalar type seen sequence shown shows similar solution spectral measure spectral operator spectrum subset sufficiently Suppose Theorem theory topology unbounded uniformly unique valued vector zero