The four known biplanes withk=11

[摘要] The four known biplanes of order9(k=11)are described in terms of their ovals,λ-chain structures, and automorphism groups. An exhaustive computer search for all biplanes of order9with certain chain structures has produced but two, one of which is new. None of these four biplanes yield the putative plane of order10.

[学科分类] 数学（综合）