Speaker: Jun Wang(Shanghai Normal University)

　　Title: Combinatorics of finite sets III: Kruskal-Katona theorem

　　Time & Venue: 2021.10.20 9:00-10:30

　　Tencent Meeting ID：486 5815 4916  Meeting Passport：314159

　　Abstract: In extremal set theory, a deep and powerfull result is the  Kruskal–Katona theorem, which  describes the size of shadows of set families.  This theorem induces a short proof of the Erdos-Ko-Rado theorem，motivated by which we shall give an analogue of finite linear vector spaces