Strictly Positive Definite Functions on Compact Two-Point Homogeneous Spaces: the Product Alternative
Strictly Positive Definite Functions on Compact Two-Point Homogeneous Spaces: the Product Alternative
For two continuous and isotropic positive definite kernels on the same compact two-point homogeneous space, we determine necessary and sufficient conditions in order that their product be strictly positive definite.We also provide a similar characterization for kernels on the space-time setting G × S d , where G is a …