Junying Lu

activity

20242026

collaborators

3 papers

math.CO2026

Threshold Ramsey multiplicity and extremal colorings for odd cycles

Ting Huang, Junying Lu, Jiabao Yang +1

The Ramsey number $r (H)$ of a graph $H$ is the minimum positive integer $n$ such that every red/blue edge-coloring of the complete graph $K_{n}$ on $n$ vertices contains a monochroma…

math.CO2025

Oriented trees in digraphs with large girth

Junying Lu, Yaojun Chen

The girth of a graph $G$ is the length of a shortest cycle of $G$ . Jiang (JCT-B, 2001) showed that every graph $G$ with girth at least $2 ℓ + 1$ and minimum degree at least $k/\ell…

math.CO2024

Oriented Ramsey numbers of some sparse graphs

Junying Lu, Yaojun Chen

Let $H$ be an oriented graph without directed cycle. The oriented Ramsey number of $H$ , denoted by $r (H)$ , is the smallest integer $N$ such that every tournament o…