English

The Modular Isomorphism Problem over all fields

Rings and Algebras 2026-02-26 v2 Group Theory

Abstract

The Modular Isomorphism Problem asks, if an isomorphism between modular group algebras of finite pp-groups over a field FF implies an isomorphism of the group bases. We explore the differences of knowledge on the problem when FF is either assumed to be a prime field or a general field of characteristic pp. After revising the literature and explaining reasons for the differences, we generalize some of the positive answers to the problem from the prime field case to the general case.

Keywords

Cite

@article{arxiv.2505.05902,
  title  = {The Modular Isomorphism Problem over all fields},
  author = {Leo Margolis and Taro Sakurai},
  journal= {arXiv preprint arXiv:2505.05902},
  year   = {2026}
}

Comments

Improved exposition incorporating referee's comments. 16 pages