Chi Hoi Yip

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20242026

most citedSperner systems with restricted differences

1 citations · 1 across the 2 of their papers we have counts for

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math.CO2026★ 1 cited

Sperner systems with restricted differences

Zixiang Xu, Chi Hoi Yip

Let $F$ be a family of subsets of $[n]$ and $L$ be a subset of $[n]$ . We say $F$ is an $L$ -differencing Sperner system if $∣ A ∖ B ∣ \in L$ for any distinct…

math.CO2025

Two-Distance Sets over Finite Fields

Jozsef Solymosi, Chi Hoi Yip

We study two-distance sets in standard $d$ -dimensional quadratic spaces over finite fields. In characteristic $3$ , we construct sets attaining the full Larman--Rogers--Seidel bound…

math.CO2025

Intersective sets over abelian groups

Zixiang Xu, Chi Hoi Yip

Given a finite abelian group $G$ and a subset $J \subset G$ with $0 \in J$ , let $D_{G} (J, N)$ be the maximum size of $A \subset G^{N}$ such that the difference set $A - A$ and $J^{N}$ ha…

math.CO2024

The subspace structure of maximum cliques in pseudo-Paley graphs from unions of cyclotomic classes

Shamil Asgarli, Chi Hoi Yip

Blokhuis showed that all maximum cliques in Paley graphs of square order have a subfield structure. Recently, it has been shown that in Peisert-type graphs, all maximum cliques are…