On the singular continuous spectrum of self-adjoint extensions.
On the singular spectrum of discrete Schrödinger operator
On the solution of Nevanlinna Pick problem with selfadjoint extensions of symmetric linear relations in Hilbert space.
On the solutions of nonlinear initial-boundary value problems.
On the spectcral theory of elliptic differential operators. I.
On the Spectra of Certain Semi-Groups.
On the spectra of elements in certain algebras of vector valued functions and sequences.
On the Spectra of Finite-Dimensional Pertobations of Matrix Multiplication Operators.
On the Spectra of Schrödinger Operators with a Complex Potential.
On the spectra of some non-normal operators.
On the spectral bound of the generator of a -semigroup
We give several conditions implying that the spectral bound of the generator of a -semigroup is negative. Applications to stability theory are considered.
On the Spectral Kernel of Symmetric Extensions.
On the spectral multiplicity of a direct sum of operators
We calculate the spectral multiplicity of the direct sum T⊕ A of a weighted shift operator T on a Banach space Y which is continuously embedded in and a suitable bounded linear operator A on a Banach space X.
On the spectral properties of tensor products of linear operators in Banach spaces
On the spectral properties of translation operators in one-dimensional tubes
We study the spectral properties of some group of unitary operators in the Hilbert space of square Lebesgue integrable holomorphic functions on a one-dimensional tube (see formula (1)). Applying the Genchev transform ([2], [5]) we prove that this group has continuous simple spectrum (Theorem 4) and that the projection-valued measure for this group has a very explicit form (Theorem 5).
On the spectral radius of positive operators.
On the spectral radius of positive operators (Corrigendum).
On the spectral set of a solvable Lie algebra of operators.
On the spectrum and eigenfunctions of the operator
On the spectrum of a morphism of quotient Hilbert spaces.