Infinite–dimensional p–adic groups, semigroups of double cosets, and inner functions on Bruhat–Tits builldings Infinite-dimensional p-adic groups, semigroups of double cosets, and inner functions on Bruhat–Tits builldings Yury A. Neretin 1 We construct p-adic analogs of operator colligations and their characteristic functions. Consider a p-adic group G = GL… (More)