Ramanujan-Identitäten zur Reziproken der Jacobischen Funktion .. .
We determine the type of the zeta functions and the range of the dimensions of the moduli spaces of finite flat models of two-dimensional local Galois representations over finite fields. This gives a generalization of Raynaud’s theorem on the uniqueness of finite flat models in low ramifications.
We study the ramification properties of the extensions under the hypothesis that is odd and if than either or ( and are the exponents with which divides and ). In particular we determine the higher ramification groups of the completed extensions and the Artin conductors of the characters of their Galois group. As an application, we give formulas for the -adique valuation of the discriminant of the studied global extensions with .
Let be a local field of characteristic . The aim of this paper is to describe the ramification groups for the pro- abelian extensions over with regards to the Artin-Schreier-Witt theory. We shall carry out this investigation entirely in the usual framework of local class field theory. This leads to a certain non-degenerate pairing that we shall define in detail, generalizing in this way the Schmid formula to Witt vectors of length . Along the way, we recover a result of Brylinski but with...
If is the splitting field of the polynomial and is a rational prime of the form , we give appropriate generators of to obtain the explicit factorization of the ideal , where is a positive rational prime. For this, we calculate the index of these generators and integral basis of certain prime ideals.
Nous appliquons à la notion d’extension (cyclique de degré ) à ramification minimale, les techniques de “ réflexion ” qui permettent une caractérisation très simple de ces extensions à l’aide d’un corps gouvernant.