2 papers
math.CO2026
Imprimitive association schemes and elimination theory
Akihiro Higashitani, Hirotake Kurihara
We prove that a commutative association scheme is imprimitive if and only if it admits a multivariate - or -polynomial structure with respect to an elimination-type monomial…
math.GT2024
Classification of generalized Alexander quandles
Akihiro Higashitani, Seiichi Kamada, Jin Kosaka +1
The aim of this paper is to provide a new characterization of isomorphism classes of generalized Alexander quandles in terms of the underlying groups and their automorphisms. This…