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papers

Publications (12)

math.SP2013

Essential spectrum of systems of singular differential equations

Orif O. Ibrogimov, Heinz Langer, Matthias Langer +1

math.FA2016

Variational principles for self-adjoint operator functions arising from second-order systems

Birgit Jacob, Matthias Langer, Carsten Trunk

math.SP2015

Triple Variational Principles for Self-Adjoint Operator Functions

Matthias Langer, Michael Strauss

math.FA2018

Path Laplacian operators and superdiffusive processes on graphs. II. Two-dimensional lattice

Ernesto Estrada, Ehsan Hameed, Matthias Langer +1

math.SP2015

Spectral properties of unbounded J-self-adjoint matrices

Matthias Langer, Michael Strauss

math.SP2015

Spectral asymptotics for resolvent differences of elliptic operators with $δ$ and $δ^\prime$-interactions on hypersurfaces

Jussi Behrndt, Gerd Grubb, Matthias Langer +1

math.SP2013

Trace formulae and singular values of resolvent power differences of self-adjoint elliptic operators

Jussi Behrndt, Matthias Langer, Vladimir Lotoreichik

math.FA2017

Spectrum of $J$-frame operators

Juan Ignacio Giribet, Matthias Langer, Leslie Leben +3

math.SP2012

Schrödinger operators with delta and delta'-potentials supported on hypersurfaces

Jussi Behrndt, Matthias Langer, Vladimir Lotoreichik

math.SP2017

Quasi boundary triples and semibounded self-adjoint extensions

Jussi Behrndt, Matthias Langer, Vladimir Lotoreichik +1

math.FA2017

Path Laplacian operators and superdiffusive processes on graphs. I. One-dimensional case

Ernesto Estrada, Ehsan Hameed, Naomichi Hatano +1

math.SP2009

A remark on Schatten-von Neumann properties of resolvent differences of generalized Robin Laplacians on bounded domains

Jussi Behrndt, Matthias Langer, Igor Lobanov +2