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E-book
Author Pyatkov, S. G

Title Operator theory : nonclassical problems / S.G. Pyatkov
Published Utrecht ; Boston : VSP, 2002

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Description 1 online resource (ix, 346 pages)
Series Inverse and ill-posed problems series, 1381-4524
Inverse and ill-posed problems series. 1381-4524
Contents Chapter 1. Indefinite inner product spaces. Linear operators. Interpolation -- 1. Indefinite inner product spaces -- 1.1. Definitions -- 1.2. Krein spaces -- 1.3. The Gram operator. W-spaces -- 1.4. J-orthogonal complements. Projective completeness -- 1.5. J-orthonormalized systems -- 2. The basic classes of operators in Krein spaces -- 2.1. J-dissipative operators -- 2.2. J-selfadjoint operators -- 3. Interpolation of Banach and Hilbert spaces and applications -- 3.1. Preliminaries -- 3.2. Continuity of some functional in a Hilbert scale
3.3. Separation of the spectrum of an unbounded operator3.4. Interpolation properties of bases -- 4. The existence of maximal semidefinite invariant subspaces for J-dissipative operators -- 5. First order equations. Decomposition of a solution -- 5.1. Function spaces -- 5.2. The Cauchy problem -- 5.3. Auxiliary definitions. Some properties of imaginary powers of operators -- 5.4. Solvability of the Cauchy problem in the original Banach space -- 5.5. Adjoint problems -- 5.6. Arbitrary operators. Phase spaces -- 5.7. Remarks and examples
Chapter 2. Spectral theory for linear selfadjoint pencils1. Examples -- 1.1. Selfadjoint pencils -- 1.2. Elliptic eigenvalue problems with indefinite weight function -- 2. Basic assumptions. The structure of root subspaces -- 3. The Riesz basis property. Invariant subspaces -- 3.1. Basis property -- 3.2. Invariant subspaces. Some applications -- 4. Sufficient conditions -- Chapter 3. Elliptic eigenvalue problems with an indefinite weight function -- 1. Auxiliary function spaces. Interpolation -- 1.1. Definitions -- 1.2. Interpolation of weighted Sobolev spaces
1.3. Inequalities of the Hardy type2. Preliminaries. Basic assumptions -- 2.1. Variational statement -- 2.2. Elliptic problems -- 3. Basisness theorems -- 3.1. The general case -- 3.2. The one-dimensional case -- 4. Examples and counterexamples -- Chapter 4. Operator-differential equations -- 1. Generalized solutions. Positive definite case -- 1.1. Preliminaries -- 1.2. Uniqueness and existence theorems -- 2. Degenerate case -- 2.1. Preliminaries -- 2.2. Solvability theorems. The case of a bounded interval
2.3. Solvability theorems. The case of the interval (0, 8)2.4. Smoothness of solutions. Orthogonality conditions -- 2.5. The periodic problem. Linear inverse problems -- 3. The Fourier method -- 3.1. Representation of solutions. First order equations -- 3.2. Some problems for the second order equations -- 4. Some applications to partial differential equations -- 4.1. Higher order parabolic equations with changing time direction -- 4.2. Second order parabolic equations with changing time direction -- 4.3. Orthogonality conditions. Parabolic equations
Bibliography Includes bibliographical references (pages 323-346) and index
Notes Print version record
Subject Operator theory.
Interpolation spaces.
Nonclassical mathematical logic.
Banach spaces.
MATHEMATICS -- Calculus.
MATHEMATICS -- Mathematical Analysis.
Banach spaces
Interpolation spaces
Nonclassical mathematical logic
Operator theory
Form Electronic book
ISBN 9783110900163
3110900165