Direct and Inverse Spectral Problems for Ordinary Differential and Functional-Differential Operators

<p>This reprint contains a collection of research papers on spectral theory for differential and functional differential operators. Spectral theory plays a fundamental role in mathematics and has applications in various fields of science and engineering e.g. in quantum and classical mechanics geophysics acoustics and electronics. The collection includes recent studies on a variety of topics such as analytical and numerical methods for solving direct and inverse spectral problems new developments in the theory of partial differential equations pseudo-differential equations with fractional derivatives asymptotical analysis for solutions of differential equations spectral theory for abstract operators in Hilbert spaces and inverse nodal problems.</p>