In this article, we study the structure of finitely ramified mixed characteristic valued fields. For any two complete discrete fields K 1 and 2 with perfect residue fields, show that if n -th rings are isomorphic for each ? , then isometric isomorphic. More generally, there is depending only on ramification indices such homomorphism from ring to can be lifted a between valuation rings. Moreover...

We exhibit the analog of entropy map for multivariate Gaussian distributions on local fields. As in real case, image this lies supermodular cone and it determines distribution valuation vector. In general, can be defined non-archimedian valued fields whose group is an additive subgroup line, remains supermodular. also explicitly compute dimension 3.

When [Formula: see text] is a finite field, [J. Becker, J. Denef and L. Lipshitz, Further remarks on the elementary theory of formal power series rings, in Model Theory Algebra Arithmetic, Proceedings Karpacz, Poland, Lecture Notes Mathematics, Vol. 834 (Springer, Berlin, 1979)] observed that total residue map text], which picks out constant term Laurent series, definable language rings with pa...