GENERALIZED TOWERS OF FLAG-TRANSITIVE CIRCULAR EXTENSIONS OF A NONCLASSICAL C(3)-GEOMETRY

[摘要] The classification of generalized towers of flag-transitive circular extensions of the sporadic A7-geometry is completed by characterizing two flat geometries on 16 points, constructed in terms of the Steiner system S(24, 8, 5), as the flag-transitive circular extensions of the duals of the sporadic A7-geometry and the Neumaier geometry for A8, and then by showing the non-existence of flag-transitive circular extensions of these geometries. (C) 1994 Academic Press, Inc.

[发布日期] 1994-05-01