TY  - GEN
AV  - public
N2  - 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. 
A1  - Vogel, Denis
KW  - Masseyprodukt 
KW  -  beschränkte Verzweigung 
KW  -  RelationenstrukturMassey product 
KW  -  restricted ramification 
KW  -  relation structure
ID  - heidok4418
UR  - https://archiv.ub.uni-heidelberg.de/volltextserver/4418/
Y1  - 2004///
TI  - Massey products in the Galois cohomology of number fields
ER  -