English

Modular Terwilliger algebras of association schemes

Combinatorics 2021-09-06 v1

Abstract

We define modular Terwilliger algebras of association schemes, Terwilliger algebras over a positive characteristic field, and consider basic properties. We give a condition for the modular Terwilliger algebra to be non-semisimple. We show that the dimension of a Terwilliger algebra of a Johnson scheme depends on the characteristic of the coefficient field. We also give some other examples.

Keywords

Cite

@article{arxiv.2004.09692,
  title  = {Modular Terwilliger algebras of association schemes},
  author = {Akihide Hanaki},
  journal= {arXiv preprint arXiv:2004.09692},
  year   = {2021}
}