Heng Li

collaborators

3 papers

math.CO2023

Many vertex-disjoint even cycles of fixed length in a graph

Jianfeng Hou, Caiyun Hu, Heng Li +3

For every integer $k \geq 3$ , we determine the extremal structure of an $n$ -vertex graph with at most $t$ vertex-disjoint copies of $C_{2 k}$ when $n$ is sufficiently large and $t$ l…

math.CO2022

Extremal graphs for the suspension of edge-critical graphs

Jianfeng Hou, Heng Li, Qinghou Zeng

The Turán number of a graph $H$ , $ex (n, H)$ , is the maximum number of edges in an $n$ -vertex graph that does not contain $H$ as a subgraph. For a vertex $v$ and a multi-set $…

math.CO2022

Two stability theorems for $K_{ℓ + 1}^{r}$ -saturated hypergraphs

Jianfeng Hou, Heng Li, Caihong Yang +2

An $F$ -saturated $r$ -graph is a maximal $r$ -graph not containing any member of $F$ as a subgraph. Let $K_{ℓ + 1}^{r}$ be the collection of all $r$ -…

Many vertex-disjoint even cycles of fixed length in a graph

Extremal graphs for the suspension of edge-critical graphs

Two stability theorems for Kℓ+1r​-saturated hypergraphs

Two stability theorems for $K_{ℓ + 1}^{r}$ -saturated hypergraphs