7 citations · 14 across the 8 of their papers we have counts for
Showing 2009 · math-phShow all
2 papers · 2 filters
math-ph2009
On the unitary equivalence of absolutely continuous parts of self-adjoint extensions
Mark M. Malamud, Hagen Neidhardt
The classical Weyl-von Neumann theorem states that for any self-adjoint operator in a separable Hilbert space there exists a (non-unique) Hilbert-Schmidt operator…
math-ph2009
Finite Rank Perturbations, Scattering Matrices and Inverse Problems
Jussi Behrndt, Mark M. Malamud, Hagen Neidhardt
In this paper the scattering matrix of a scattering system consisting of two selfadjoint operators with finite dimensional resolvent difference is expressed in terms of a matrix Ne…