摘要
Let D be a nontrivial symmetric(v, k, 4) design, and G ≤ Aut(D) be flag-transitive and point-primitive with PSL_n(q) as socle. Then D is a 2-(15, 8, 4) symmetric design and Soc(G) = PSL_2(9).
Let D be a nontrivial symmetric(v, k, 4) design, and G ≤ Aut(D) be flag-transitive and point-primitive with PSL_n(q) as socle. Then D is a 2-(15, 8, 4) symmetric design and Soc(G) = PSL_2(9).
基金
Supported by the National Natural Science Foundation of China(Grant Nos.11471123
11626206)
the Scientific Research Foundation for Excellent Talents of Xuzhou Medical University(Grant No.D2016002)