Konstantin Pankrashkin

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20232026

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math.SP2025

Eigenvalue asymptotics for strong $δ$ -interactions supported on curves with corners

Badreddine Benhellal, Noah Körner, Konstantin Pankrashkin

Let $Γ \subset R^{2}$ be a piecewise smooth closed curve with corners. We discuss the asymptotic behavior of the individual eigenvalues of the two-dimensional Schrödinger oper…

math.SP2023

On Neumann-Poincaré operators and self-adjoint transmission problems

Badreddine Benhellal, Konstantin Pankrashkin

We discuss the self-adjointness in $L^{2}$ -setting of the operators acting as $- \nabla \cdot h \nabla$ , with piecewise constant functions $h$ having a jump along a Lipschitz hypersurfa…

Eigenvalue asymptotics for strong δ-interactions supported on curves with corners

On Neumann-Poincaré operators and self-adjoint transmission problems

Eigenvalue asymptotics for strong $δ$ -interactions supported on curves with corners