English

An alternative proof that the Fibonacci group F(2,9) is infinite

Group Theory 2009-09-25 v1

Abstract

This note contains a report of a proof by computer that the Fibonacci group F(2,9) is automatic. The automatic structure can be used to solve the word problem in the group. Furthermore, it can be seen directly from the word-acceptor that the group generators have infinite order, which of course implies that the group itself is infinite.

Keywords

Cite

@article{arxiv.math/9507204,
  title  = {An alternative proof that the Fibonacci group F(2,9) is infinite},
  author = {Derek F. Holt},
  journal= {arXiv preprint arXiv:math/9507204},
  year   = {2009}
}

Comments

LaTex, 3 pages, no figures. To appear in Experimental Mathematics

R2 v1 2026-07-22T17:55:39.232Z