Chi Hoi Yip

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20242026

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math.CO2026

Cliques in Paley graphs of square order and in Peisert graphs

Andries E. Brouwer, Sergey Goryainov, Leonid Shalaginov +1

We study maximal cliques in the collinearity graphs of Desarguesian nets, give some structural results and some numerical information. In particular, we show for Desarguesian nets…

math.CO2025

Generalized additive bases and difference bases for Cartesian product of finite abelian groups

Shuxing Li, Chi Hoi Yip

For a finite group $G$ and positive integer $g$ , a $g$ -additive basis is a subset of $G$ whose pairwise sums cover each element of $G$ at least $g$ times, with $g$ -difference bases…