Radial positive definite functions and Schoenberg matrices with negative eigenvalues

L. Golinskii, M. Malamud, L. Oridoroga

The main object under consideration is a class ${\Phi }_n\backslash {\Phi }_{n+1}$ of radial positive definite functions on ${\mathbb{R}}^n$ which do not admit \emph{radial positive definite continuation…