首页 | 本学科首页   官方微博 | 高级检索  
     


The Unbalance of Set Systems
Authors:Nathan Lemons  Cory Palmer
Affiliation:(1) Department of Mathematics and its Applications, Central European University, Nádor u. 9, Budapest, H-1051, Hungary
Abstract:The unbalance of an intersecting family $${mathcal{F}}F$$ is defined as $$|{mathcal{F}}| - d({mathcal{F}})$$, where $$d({mathcal{F}})$$ is the maximum degree of $${mathcal{F}}$$ i.e. the maximum of $$|{F in {mathcal{F}} : x in F}|$$ over all vertices x. We show that the unbalance of a k-uniform intersecting family is at most $$binom{n-3}{k-2}$$ when n ≥ 6k 3 and we determine all families achieving this bound.
Keywords:Intersecting set systems  Intersecting families
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号