Ana Breda

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By a covering of a group G we mean an epimorphism from a groupˆG to G. Introducing the notion of strong covering as a covering π : ˆ G → G such that every automorphism of G is a projection via π of an automorphism ofˆG, the main aim of this paper is to characterise double coverings which are strong. This is done in details for metacyclic groups, rotary(More)
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