par Leemans, Dimitri 
Référence Geometriae dedicata, 85, 1-3, page (273-281)
Publication Publié, 2001
Référence Geometriae dedicata, 85, 1-3, page (273-281)
Publication Publié, 2001
Article révisé par les pairs
| Résumé : | We construct a rank five residually connected and firm geometry Γ on which the Mathieu group M12 acts flag-transitively and residually weakly primitively (RWPRI). The group M12 is the group of automorphisms of Γ and Aut(M12) is the correlation group of Γ, in particular Γ is self-dual. The diagram of Γ is the following. matrix presented Moreover Γ satisfies the conditions (IP)2 and (2T)1. As a corollary, we obtain that the (RWPRI + (IP)2)-rank of M12 is 5. |
