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Symmetric generation of the Rudvalis group

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Abstract:

Two symmetric presentations for the Rudvalis sporadic simple group Ru are given, and corresponding presentations in terms of generators and relations are deduced. The first considers the linear group L4(2) acting imprimitively on 105 letters and so analyses a progenitor of form 2*105 : L4(2). Certain short relations follow from the basic lemmas of symmetric generation of groups and the resulting homomorphic image is shown to be Ru. In the second approach we work within Ru to show that the group is generated (uniquely up to conjugation) by a set of seven involutions whose set normalizer in Ru is the linear group L3(2), and which is such that any set of four of these involutions, no three of which lie on a line of the underlying projective plane, generates a copy of the Tits simple group 2F4(2)′. Thus Ru is obtained as an image of the progenitor 2*7 : L3(2).

Tópico:

Homotopy and Cohomology in Algebraic Topology

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Información de la Fuente:

SCImago Journal & Country Rank
FuenteJournal of the London Mathematical Society
Cuartil año de publicaciónNo disponible
Volumen82
Issue3
Páginas643 - 662
pISSNNo disponible
ISSN1469-7750

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