A Question of R. Maier Concerning Format
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A. Ballester-Bolinches; M.D. Pรฉrez-Ramos
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Article
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1996
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Elsevier Science
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English
โ 160 KB
Throughout the paper we consider only finite groups. A formation is a class แ of groups with the following properties: i Every homomorphic image of an แ-group is an แ-group. ลฝ . ลฝ . ii If GrM and GrN are แ-groups, then also Gr M l N belongs to แ.