Department of Mathematics
On Rayleigh-Type Formulas for a Non-local Boundary Value Problem Associated with an
Integral Operator Commuting with the Laplacian
- Author(s): Hermi, Lotfi
- Saito, Naoki
- et al.
Published Web Locationhttps://arxiv.org/pdf/1009.4168.pdf
In this article we prove the existence, uniqueness, and simplicity of a negative eigenvalue for a class of integral operators whose kernel is of the form $|x-y|^\rho$, $0 < \rho \leq 1$, $x, y \in [-a, a]$. We also provide two different ways of producing recursive formulas for the Rayleigh functions (i.e., recursion formulas for power sums) of the eigenvalues of this integral operator when $\rho=1$, providing means of approximating this negative eigenvalue. These methods offer recursive procedures for dealing with the eigenvalues of a one-dimensional Laplacian with non-local boundary conditions which commutes with an integral operator having a harmonic kernel. The problem emerged in recent work by one of the authors . We also discuss extensions in higher dimensions and links with distance matrices.