Spectral theory and differential operators

摘要: Linear operations in Banach spaces Entropy numbers, s-numbers, and eigenvalues Unbounded linear operators Sesquilinear forms Hilbert Sobolev Generalized Dirichlet Neumann boundary-value problems Second-order differential on arbitrary open sets Capacity compactness criteria Essential spectra of general second-order Global asymptotic estimates for the eigen-values - + q when is real. Estimates singular values 1 complete Bibliography Notation index Subject