On the distribution of eigenvalues of non-selfadjoint operators
On the eigenfunctions of Sturm--Liouville operators with potentials --- distributions
On the eigenvalue estimates for the weighted Laplacian on metric graphs
On The Eigenvalues of Some Vectorial Sturm-Liouville Eigenvalue Problems
On the essential spectrum of magnetic Schroedinger operators in exterior domains
On the Essential Spectrum of Phase-Space Anisotropic Pseudodifferential Operators
On the evaluation of the norm of an integral operator associated with the stability of one-electron atoms
On the existence of solutions to the operator Riccati equation and the tanΘtheorem
On the expansion of the resolvent for elliptic boundary contact problems
On the formula of regularized traces
On the fundamental eigenvalue ratio of the p-Laplacian
On the Hersch-Payne-Schiffer inequalities for Steklov eigenvalues
On the Hill's Operator with Matrix Potential
On the Inner Radius of Nodal Domains
On the instability of eigenvalues
On the invariant spectrum of $S^1$-invariant metrics on $S^2$
On the inverse scattering problem for Jacobi matrices with the spectrum on an interval, a finite system of intervals or a Cantor set of positive length
On the Koplienko spectral shift function, I. Basics
On the limit behaviour of second order relative spectra of self-adjoint operators
On the Measure of the Absolutely Continuous Spectrum for Jacobi Matrices