47 citations · 176 across the 17 of their papers we have counts for
4 papers · 1 filter
Simplicity of extremal eigenvalues of the Klein-Gordon equation
Mario Koppen, Christiane Tretter, Monika Winklmeier
We consider the spectral problem associated with the Klein-Gordon equation for unbounded electric potentials. If the spectrum of this problem is contained in two disjoint real inte…
A Variational Principle for Block Operator Matrices and its Application to the Angular Part of the Dirac Operator in Curved Spacetime
Monika Winklmeier
The operator associated to the angular part of the Dirac equation in the Kerr-Newman background metric is a block operator matrix with bounded diagonal and unbounded off-diagonal e…
On the local energy decay of solutions of the Dirac equation in the non-extreme Kerr-Newman metric, I
Monika Winklmeier, Osanobu Yamada
We investigate the local energy decay of solutions of the Dirac equation in the non-extreme Kerr-Newman metric. First, we write the Dirac equation as a Cauchy problem and define th…
On the Eigenvalues of the Chandrasekhar-Page Angular Equation
Davide Batic, Harald Schmid, Monika Winklmeier
In this paper we study for a given azimuthal quantum number the eigenvalues of the Chandrasekhar-Page angular equation with respect to the parameters and , where…