Geodesic
Some topological properties of residually Černikov groups
Glasgow mathematical journal, Tome 23 (1982) no. 1, pp. 65-82

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

In this paper we shall indicate how to generalise the concept of a cofinite group (see [7]). We recall that any residually finite group can be made into a topological group by taking as a basis of neighbourhoods of the identity precisely the normal subgroups of finite index. The class of compact cofinite groups is then easily seen to be the class of profinite groups, where a group is profinite if and only if it is an inverse limit of finite groups. It turns out that every cofinite group can be embedded as a dense subgroup of a profinite group. This has important consequences for the class of countable locally finite-soluble groups with finite Sylow p-subgroups for all primes p, as shown in [7] and [14]. 
Dixon, M. R. Some topological properties of residually Černikov groups. Glasgow mathematical journal, Tome 23 (1982) no. 1, pp. 65-82. doi: 10.1017/S0017089500004791
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