Geodesic
On the group ring of a free product with amalgamation
Glasgow mathematical journal, Tome 21 (1980) no. 2, pp. 135-138

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

Let G = A*HB be the free product of the groups A and B amalgamating the proper subgroup H and let Rbe a ring with 1. If His finite and G is not finitely generated we show that any non–zero ideal I of R(G) intersects non-trivially with the group ring R(M), where M = M(I) is a subgroup of G which is a free product amalgamating a finite normal subgroup. This result compares with A. I. Lichtman's results in [6] but is not a direct generalisation of these. 
On the group ring of a free product with amalgamation. Glasgow mathematical journal, Tome 21 (1980) no. 2, pp. 135-138. doi: 10.1017/S0017089500004274
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