Galois Groups of Local Fields, Lie Algebras and Ramification

نویسنده

  • VICTOR ABRASHKIN
چکیده

Suppose K is a local field with finite residue field of characteristic p 6= 2 and K<p(M) is its maximal p-extension such that Gal(K<p(M)/K) has period p M and nilpotent class < p. If charK = 0 we assume that K contains a primitive p -th root of unity. The paper contains an overview of methods and results describing the structure of this Galois group together with its filtration by ramification subgroups.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

AUTOMORPHISMS OF LOCAL FIELDS OF PERIOD p AND NILPOTENT CLASS < p

Suppose K is a finite field extension of Qp containing a primitive p-th root of unity. Let ΓK(1) be the Galois group of a maximal p-extension of K with the Galois group of period p and nilpotent class < p. In the paper we describe the ramification filtration {ΓK(1)}v>0 and relate it to an explicit form of the Demushkin relation for ΓK(1). The results are given in terms of Lie algebras attached ...

متن کامل

Capitulation for Locally Free Class Groups of Orders of Group Algebras over Number Fields

We prove a capitulation result for locally free class groups of orders of group algebras over number fields. This result allows some control over ramification and so as a corollary we obtain an “arithmetically disjoint capitulation result” for the Galois module structure of rings of integers.

متن کامل

Deformation of Outer Representations of Galois Group II

This paper is devoted to deformation theory of "anabelian" representations of the absolute Galois group landing in outer automorphism group of the algebraic fundamental group of a hyperbolic smooth curve defined over a number-field. In the first part of this paper, we obtained several universal deformations for Lie-algebra versions of the above representation using the Schlessinger criteria for...

متن کامل

Ramification groups of local fields

We recall the definition and basic properties of ramification groups. We compute it in the most elementary cases. One is the classical case, i.e., the case where the residue field is perfect. The other is the abelian and the equal characterictic case. Plan 1. Ramification groups. 2. Classical case. 3. Rank 1 case. (Possible) Applications. 1. Grothendieck-Ogg-Shafarevich formula, conductor formu...

متن کامل

p-adic Galois Representations Math 162b Winter 2012 Lecture Notes

1 Local Class Field Theory 2 1.1 Local fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.2 Newton polygons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.3 Ramification of local fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.4 Main results of local class field ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2014