A question from the Kourovka Notebook on formation products

[EN] It is shown in this paper that if X is a class of simple groups such that pi(X) = char X, the X-saturated formation H generated by a finite group cannot be expressed as the Gaschütz product F o G of two non-X-saturated formations if H = G. It answers some open questions on products of formation...

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Detalhes bibliográficos
Autores: Ballester Bolinches, Adolfo, Calvo Lopez, Clara, Esteban Romero, Ramón
Formato: artículo
Fecha de publicación:2003
País:España
Recursos:Universitat Politècnica de València (UPV)
Repositorio:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
Idioma:inglés
OAI Identifier:oai:riunet.upv.es:10251/19031
Acesso em linha:https://riunet.upv.es/handle/10251/19031
Access Level:acceso abierto
Palavra-chave:Finite group
X-local formation
Saturated formation
X-saturated formation
Composition formation
Omega-saturated formation
MATEMATICA APLICADA
Descrição
Resumo:[EN] It is shown in this paper that if X is a class of simple groups such that pi(X) = char X, the X-saturated formation H generated by a finite group cannot be expressed as the Gaschütz product F o G of two non-X-saturated formations if H = G. It answers some open questions on products of formations. The relation between omega-saturated and X-saturated formations is also discussed.