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Full Description
This book is an updated version of the classic 1987 monograph "Spectral Theory and Differential Operators".The original book was a cutting edge account of the theory of bounded and closed linear operators in Banach and Hilbert spaces relevant to spectral problems involving differential equations.
It is accessible to a graduate student as well as meeting the needs of seasoned researchers in mathematics and mathematical physics.
This revised edition corrects various errors, and adds extensive notes to the end of each chapter which describe the considerable progress that has been made on the topic in the last 30 years.
Contents
1: Linear operators in Banach spaces
2: Entropy numbers, s-numbers, and eigenvalues
3: Unbounded linear operators
4: Sesqilinear forms in Hilbert spaces
5: Sobolve spaces
6: Generalized Dirichlet and Neumann boundary-value problems
7: Second-order differantial operators on arbitary open sets
8: Capacity and compactness criteria
9: Essential spectra
10: Essential spectra of general second-order differential operators
11: Global and asymptotic estimates for the eigenvalues
12: Estimates of the singular values
Bibliography