symmetric monoidal (∞,1)-category of spectra
Given some algebraic object like an associative algebra or group or Lie algebra which with a notion of central extension, one may ask for the largest possible such, the maximal central extension. This makes sense if one considers subobjects of a given algebraic object.
The lower central series of the absolute Galois group of a field is obtained by iterating the process of forming the maximal central extension of the maximal nilpotent extension of a given class, starting with the maximal abelian extension. The purpose of this paper is to give a cohomological description of this central series in case of an algebraic number field.
Last revised on July 31, 2018 at 04:38:27. See the history of this page for a list of all contributions to it.