English

On indecomposable involutive solutions to the Yang-Baxter equation whose squaring map is a $p$-cycle

Quantum Algebra 2025-08-05 v1 Group Theory

Abstract

The pioneering work of Rump, which proved Gateva-Ivanova's conjecture concerning the decomposability of square-free solutions to the Yang-Baxter equation, significantly motivated further research into the associated squaring map TT. This line of inquiry has yielded numerous decomposability theorems based on the underlying structure of TT. Two seminal questions, posed by Ram\'irez and Vendramin, ask about the existence of certain indecomposable involutive solutions whose squaring maps are transpositions or 3-cycles. In this paper, we explore this problem in a more general setting by examining the case where TT is a pp-cycle, for an arbitrary prime number pp. Our results provide negative answers to the aforementioned questions under the assumption that the solution is latin or that its size is a prime-power. As a further application, we also present some decomposability theorems for solutions whose permutation groups are nilpotent.

Keywords

Cite

@article{arxiv.2508.01613,
  title  = {On indecomposable involutive solutions to the Yang-Baxter equation whose squaring map is a $p$-cycle},
  author = {Marco Castelli and Arpan Kanrar},
  journal= {arXiv preprint arXiv:2508.01613},
  year   = {2025}
}

Comments

9 pages + References, Comments eelcome!