7 citations · 14 across the 8 of their papers we have counts for
4 papers · 1 filter
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…
Elliptic and weakly coercive systems of operators in Sobolev spaces
D. V. Limanskii, M. M. Malamud
It is known that an elliptic system of order is weakly coercive in , that is, all differential monom…
On the Spectral Analysis of Direct Sums of Riemann-Liouville Operators in Sobolev Spaces of Vector Functions
I. Yu. Domanov, M. M. Malamud
Let be a real power of the integration operator defined on Sobolev space . We investigate the spectral properties of the operator $A_k=\bigoplus_{j=1}^n λ…
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…