Titlebook: Blocks of Finite Groups; The Hyperfocal Subal Lluís Puig Book 2002 Springer-Verlag Berlin Heidelberg 2002 Group.algebra.block.hyperfocal al

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https://doi.org/10.1007/978-3-211-72329-6one; in particular, the multiplication by . ∈ ? becomes the .-th power, and thus this function is helpful in proving the existence of the .-th root of some elements. In §14 and §15, we need this kind of results; in this section, we will prove them.