Tight Euclidean t-Designs and TightRelative t-Designs in Certain Association Schemes

24.06.2015  12:18
主  讲  人  : 板内英一       

活动时间: 06月24日15时00分       

地            点  : 理科群1号楼D-203室

讲座内容:

It is known that there is a close analogy between the two relations “Euclidean t-designs vs. spherical t-designs” and “relative t-designs in binary Hamming association schemes vs. combinatorial t-designs.” In this talk, we first look at this analogy and survey the known results, putting emphasis on the study of tight relative t-designs in certain Q-polynomial association schemes.We then specifically study tight relative 2-designs on two shells in binary Hamming association schemes H(n, 2) and Johnson association schemes J(v, k).

主讲人介绍:

板内英一,国际著名代数组合学家,现为上海交通大学讲席教授,曾为美国俄亥俄州立大学全职教授(1984—1989),日本九州大学全职教授(1989—2009);代数组合第一部专著《结合方案》的作者,多个国际数学杂志的主编或编委,多次应邀在国际数学会议上作大会报告,曾获日本数学会代数奖。

发布时间:2015-06-24 09:24:03