R. Weikard

activity

19972026

most citedSpectral Theory for Systems of Ordinary Differential Equations with Distributional Coefficients

20 citations · 62 across the 21 of their papers we have counts for

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Showing 2013 · math.SPShow all

3 papers · 2 filters

math.SP2013

Some Remarks on the Spectral Problem Underlying the Camassa-Holm Hierarchy

Fritz Gesztesy, Rudi Weikard

We consider left-definite eigenvalue problems $A ψ = λ B ψ$ , with $A \geq ε I$ for some $ε > 0$ and $B$ self-adjoint, but $B$ not necessarily positive or negative…

math.SP2013

Stability for the inverse resonance problem for the CMV operator

Roman Shterenberg, Rudi Weikard, Maxim Zinchenko

For the class of unitary CMV operators with super-exponentially decaying Verblunsky coefficients we give a new proof of the inverse resonance problem of reconstructing the operator…

math.SP2013

On Spectral Theory for Schrödinger Operators with Operator-Valued Potentials

Fritz Gesztesy, Rudi Weikard, Maxim Zinchenko

Given a complex, separable Hilbert space $\cH$, we consider differential expressions of the type $τ = - (d^{2} / d x^{2}) + V (x)$ , with $x \in (a, \infty)$ or $x \in R$ . Here $V$ denotes…