I want to find an example of an infinitely generated discrete subgroup of ${\rm SL}(2,\Bbb R)$ but I haven't managed to find such a subgroup.

Please would someone help me to find such subgroup?

  • 1
    $\begingroup$ (Optional) hint: there exist finitely generated groups with infinitely generated subgroups $\endgroup$
    – YCor
    Feb 17, 2020 at 18:46
  • $\begingroup$ I am sure this was asked earlier. $\endgroup$ Feb 17, 2020 at 22:56
  • $\begingroup$ math.stackexchange.com/questions/1986435/… $\endgroup$ Feb 18, 2020 at 2:50


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