collaborators

4 papers

math.CO2026

Pseudo-Euclidean representations of switching classes of Johnson and Hamming graphs with minimal dimension

Hiroshi Nozaki, Masashi Shinohara, Sho Suda

This paper considers minimum-dimensional representations of graphs in pseudo-Euclidean spaces, where adjacency and non-adjacency relations are reflected in fixed scalar square valu…

math.CO2025

Three-dimensional symmetric designs of propriety 3

Amin Bahmanian, Vedran Krčadinac, Lucija Relić +1

We define symmetric designs of dimension and propriety , providing a unifying generalization of several classes of higher-dimensional symmetric designs previously studied. W…

math.CO2025

Existence and nonexistence of spherical -designs of minimal type

Sho Suda, Zili Xu, Wei-Hsuan Yu

This paper investigates the existence and properties of spherical -designs of minimal type. We focus on two cases: tight spherical -designs and antipodal spherical -distan…

math.CO2025

Codes with symmetric distances

Gábor Hegedüs, Sho Suda, Ziqing Xiang

For a code in a space with maximal distance , we say that has symmetric distances if its distance set is symmetric with respect to . In this paper, we prov…