KOLMOGOROV DECOMPOSITIONS AND EXTREMALITY CONDITIONS FOR POSITIVE COVARIANT KERNELS

Haapasalo, E; Pellonpaa, JP

Haapasalo, E (reprint author), Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China.

REPORTS ON MATHEMATICAL PHYSICS, 2019; 83 (2): 253

Abstract

We study positive kernels on X x X, where X is a set equipped with an action of a group, and taking values in the set of A-sesquilinear forms on a (no......

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