Geodesic
N-Series and Filtrations of the Augmentation Ideal
Canadian journal of mathematics, Tome 26 (1974) no. 4, pp. 962-977

Voir la notice de l'article provenant de la source Cambridge University Press

Let G be a group. Denote by ZG the group ring of G over the integers and by Δ = Δ(G) the augmentation ideal of ZG, that is, the kernel of the augmentation map ε : ZG → Z defined by . Then Δ is a free abelian group with a free basis . A filtration of Δ is a sequence 
Losey, Gerald. N-Series and Filtrations of the Augmentation Ideal. Canadian journal of mathematics, Tome 26 (1974) no. 4, pp. 962-977. doi: 10.4153/CJM-1974-090-9
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