6 citations · 9 across the 6 of their papers we have counts for
6 papers
Factorization Theorem for the Transfer Function Associated with an Unbounded Non-Self-Adjoint 2x2 Operator Matrix
V. Hardt, R. Mennicken, A. K. Motovilov
We construct operators which factorize the transfer function associated with a non-self-adjoint 2x2 operator matrix whose diagonal entries can have overlapping spectra and whose of…
Factorization theorem for the transfer function of a 2x2 operator matrix with unbounded couplings
V. Hardt, R. Mennicken, A. K. Motovilov
We consider the analytic continuation of the transfer function associated with a 2x2 operator matrix having unbounded couplings into unphysical sheets of its Riemann surface. We co…
Boundary value problems for a class of elliptic operator pencils
R. Denk, R. Mennicken, L. Volevich
In this paper operator pencils are studied which act on a manifold with boundary and satisfy the condition of -ellipticity with parameter, a generalization of the not…
Operator interpretation of resonances generated by some operator matrices
R. Mennicken, A. K. Motovilov
We consider the analytic continuation of the transfer function for a 2x2 matrix Hamiltonian into the unphysical sheets of the energy Riemann surface. We construct a family of non-s…
Operator interpretation of resonances arising in spectral problems for 2x2 matrix Hamiltonians
A. K. Motovilov, R. Mennicken
We consider the analytic continuation of the transfer function for a 2x2 matrix Hamiltonian into the unphysical sheets of the energy Riemann surface. We construct non-selfadjoint o…
Operator interpretation of resonances arising in spectral problems for 2 x 2 operator matrices
R. Mennicken, A. K. Motovilov
We consider operator matrices {\bf H}= (A_0 B_{01} \\ B_{10} A_{1}) with self-adjoint entries A_i, i=0,1, and bounded B_{01}=B_{10}^*, acting in the orthogonal sum {\cal H}={\cal H…