Nonsingularity of unsymmetric Kansa matrices: Random collocation by MultiQuadrics and Inverse MultiQuadrics

R. Cavoretto, A. De Rossi, Dell’Accio, F., A. Sommariva and M. Vianello

Mathematics and Computers in Simulation (MATCOM), 2025, vol. 234, issue C, 390-395

Abstract: Unisolvence of unsymmetric Kansa collocation is still a substantially open problem. We prove that Kansa matrices with MultiQuadrics and Inverse MultiQuadrics for the Dirichlet problem of the Poisson equation are almost surely nonsingular, when the collocation points are chosen by any continuous random distribution in the domain interior and arbitrarily on its boundary.

Keywords: Poisson equation; Unsymmetric Kansa collocation method; Radial Basis Functions; MultiQuadrics; Inverse MultiQuadrics; Unisolvence (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:matcom:v:234:y:2025:i:c:p:390-395

DOI: 10.1016/j.matcom.2025.03.005

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