English

Thompson's group $T$ is $\frac{3}{2}$-generated

Group Theory 2023-07-14 v3

Abstract

Every finite simple group can be generated by two elements and, in fact, every nontrivial element is contained in a generating pair. Groups with this property are said to be 32\frac{3}{2}-generated, and the finite 32\frac{3}{2}-generated groups were recently classified. Turning to infinite groups, in this paper, we prove that the finitely presented simple group TT of Thompson is 32\frac{3}{2}-generated. Moreover, we exhibit an element ζT\zeta \in T such that for any nontrivial αT\alpha \in T, there exists γT\gamma \in T such that α,ζγ=T\langle \alpha, \zeta^\gamma \rangle = T.

Keywords

Cite

@article{arxiv.2206.05316,
  title  = {Thompson's group $T$ is $\frac{3}{2}$-generated},
  author = {Collin Bleak and Scott Harper and Rachel Skipper},
  journal= {arXiv preprint arXiv:2206.05316},
  year   = {2023}
}

Comments

11 pages; to appear in Israel Journal of Mathematics

R2 v1 2026-06-24T11:47:05.112Z