Hexuan Zhi

collaborators

2 papers

math.CO2026

Online Ramsey numbers of the claw versus cycles

Hexuan Zhi, Yanbo Zhang

The online Ramsey number $r ~ (G, H)$ is defined via a Builder--Painter game on an empty graph with countably many vertices. In each round, Builder reveals an edge, which Painte…

math.CO2025

Three-color online Ramsey numbers $r ~ (P_{3}, P_{3}, P_{ℓ})$ and $r ~ (P_{3}, P_{3}, C_{ℓ})$

Hexuan Zhi, Yanbo Zhang

For given graphs $G_{1}, \dots, G_{k}$ , let $r ~ (G_{1}, \dots, G_{k})$ denote their online Ramsey number. In an influential paper on the online Ramsey numbers for paths and cycles,…

Online Ramsey numbers of the claw versus cycles

Three-color online Ramsey numbers r~(P3​,P3​,Pℓ​) and r~(P3​,P3​,Cℓ​)

Three-color online Ramsey numbers $r ~ (P_{3}, P_{3}, P_{ℓ})$ and $r ~ (P_{3}, P_{3}, C_{ℓ})$