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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Grupos cobertos por cinco subgrupos maximais / Covering groups of five maximais

Kiara Lima Costa 27 February 2012 (has links)
Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico / Esta dissertaÃÃo à baseado no artigo "Covering groups with subgroups" de R. A. Bryce, V. Fedri e L. Serena, onde caracterizam os grupos que admitem uma cobertura irredundante por cinco subgrupos maximais com interseÃÃo livre de nÃcleo. AlÃm disso, a intersecÃÃo de uma cobertura irredundante por n subgrupos à conhecido por ter Ãndice delimitada por uma funÃÃo de n, embora em geral, a limitaÃÃo precisa nÃo à conhecida. Aqui nÃs confirmamos um crÃdito de Tomkinson que a limitaÃÃo correta à 16 quando n à 5. / This dissertation is based on the article "Covering groups with subgroups" of R. A. Bryce, V. Fedra and L. Serena, which characterize groups that admit a cover by five maximal irredundant subgroups with free core intersection. The intersection of an irredundant cover by n subgroups is known to have index bounded by a function of n, though in general the precise bound is not known. Here we confirm a claim of Tomkinson that the correct bound is 16 when n is 5.

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