138 citations · 1.3k across the 90 of their papers we have counts for
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math.SP2011★ 26 cited
On the similarity of Sturm-Liouville operators with non-Hermitian boundary conditions to self-adjoint and normal operators
D. Krejcirik, P. Siegl, J. Zelezny
We consider one-dimensional Schroedinger-type operators in a bounded interval with non-self-adjoint Robin-type boundary conditions. It is well known that such operators are generic…
math.SP2011
The effective Hamiltonian for thin layers with non-Hermitian Robin-type boundary conditions
Denis Borisov, David Krejcirik
The Laplacian in an unbounded tubular neighbourhood of a hyperplane with non-Hermitian complex-symmetric Robin-type boundary conditions is investigated in the limit when the width…