On the convergence of second order spectra and multiplicity
On the Differential Operators with Periodic Matrix Coefficients
On the Dirac and Pauli operators with several Aharonov-Bohm solenoids
On the Direct Cauchy Theorem in Widom Domains: Positive and Negative Examples
On the discrete spectrum of a family of differential operators
On the discrete spectrum of a spatial quantum waveguide with a disc window
On the discrete spectrum of complex banded matrices
On the discrete spectrum of non-selfadjoint operators
On the discrete spectrum of quantum layers
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