Biao Wu

activity

20242026

collaborators

5 papers

math.CO2026

The ErdÅs-Ko-Rado Theorem in $ℓ_{2}$ -Norm

Biao Wu, Huajun Zhang

The codegree squared sum $co_{2} (F)$ of a family (hypergraph) $F \subseteq (k [ n ])$ is defined to be the sum of codegrees squared $d (E)^{2}$ over all $E\in \binom…

math.CO2025

On cross-2-intersecting families

Yanhong Chen, Anshui Li, Biao Wu +1

Two families $A \subseteq (k [ n ])$ and $B \subseteq (ℓ [ n ])$ are called cross- $t$ -intersecting if $∣ A \cap B ∣ \geq t$ for all $A \in A$ , $B\in\m…

math.CO2024

Exact extremal non-trivial cross-intersecting families

Biao Wu, Huajun Zhang

Two families $A$ and $B$ of sets are called cross-intersecting if each pair of sets $A \in A$ and $B \in B$ has nonempty intersection. Let $\c…

math.CO2024

On a conjecture of Tokushige for cross- $t$ -intersecting families

Huajun Zhang, Biao Wu

Two families of sets $A$ and $B$ are called cross- $t$ -intersecting if $∣ A \cap B ∣ \geq t$ for all $A \in A$ , $B \in B$ . An active problem in extr…

math.CO2024

Stabilities for non-uniform $t$ -intersecting families

Yongtao Li, Biao Wu

The study of intersection problems on families of sets is one of the most important topics in extremal combinatorics. As we all know, the extremal problems involving certain inters…

The ErdÅs-Ko-Rado Theorem in ℓ2​-Norm

On cross-2-intersecting families

Exact extremal non-trivial cross-intersecting families

On a conjecture of Tokushige for cross-t-intersecting families

Stabilities for non-uniform t-intersecting families

The ErdÅs-Ko-Rado Theorem in $ℓ_{2}$ -Norm

On a conjecture of Tokushige for cross- $t$ -intersecting families

Stabilities for non-uniform $t$ -intersecting families