In this paper the positive and strictly contractive extension problems for almost periodic matrix functions are treated. We present necessary and sufficient conditions for the existence of extensions ...

Denote by 𝐴𝑃(G) (respectively ap(G)) the space of all almost periodic functions (respectively almost periodic measures) defined on a Hausdorff locally compact abelian group 𝐺 and by 𝑀(μ) or ...