%0 Generic
%A Vogel, Denis
%D 2004
%F heidok:4418
%K Masseyprodukt , beschränkte Verzweigung , RelationenstrukturMassey product , restricted ramification , relation structure
%R 10.11588/heidok.00004418
%T Massey products in the Galois cohomology of number fields
%U https://archiv.ub.uni-heidelberg.de/volltextserver/4418/
%X We study the relation structure of the Galois group of the maximal outside a finite set of primes unramified p-extension of Q and of the Galois group of the p-class field tower of a quadratic number field. This relation structure is described in terms of Massey products in the Galois cohomology of number fields. A connection is given to Milnor invariants and Redei symbols. In particluar, we prove a number theoretic analogue of the theorem of Porter and Turaev from link theory.