Dehai Liu

activity

20232026

collaborators

Showing 2024Show all

3 papers · 1 filter

math.CO2024

$s$ -almost $t$ -intersecting families for finite sets

Dehai Liu, Kaishun Wang, Tian Yao

A family $F$ of $k$ -subsets of an $n$ -set is called $s$ -almost $t$ -intersecting if each member is $t$ -disjoint with at most $s$ members. In this paper, we prove that, if…

math.CO2024

$s$ -almost $t$ -intersecting families for vector spaces

Lijun Ji, Dehai Liu, Kaishun Wang +2

Let $V$ be a finite dimensional vector space over a finite field, and $F$ a family consisting of $k$ -subspaces of $V$ . The family $F$ is called $t$ -intersecting…

math.CO2024

The maximum sum of sizes of non-empty cross $t$ -intersecting families

Shuang Li, Dehai Liu, Deping Song +1

Let $[n] := {1, 2, \dots, n}$ , and $M$ be a set of positive integers. Denote the family of all subsets of $[n]$ with sizes in $M$ by $(M [ n ])$ . The non-…

s-almost t-intersecting families for finite sets

s-almost t-intersecting families for vector spaces

The maximum sum of sizes of non-empty cross t-intersecting families

$s$ -almost $t$ -intersecting families for finite sets

$s$ -almost $t$ -intersecting families for vector spaces

The maximum sum of sizes of non-empty cross $t$ -intersecting families