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A (c · L*)-Geometry for the Sporadic Group J2

par Buekenhout, Francis ;Huybrechts, Cécile
Référence Geometriae dedicata, 73, 3, page (225-235)
Publication Publié, 1998

Article révisé par les pairs

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Résumé :

We prove the existence of a rank three geometry admitting the Hall-Janko group J2 as flag-transitive automorphism group and Aut(J2) as full automorphism group. This geometry belongs to the diagram (c · L*) and its nontrivial residues are complete graphs of size 10 and dual Hermitian unitals of order 3.