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math.SP2001
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…
math.SP1999
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…
math.SP1998★ 3 cited
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…