thin subgroup
given a real semisimple algebraic group G, a descrete Zariski-dense subgroup of G(ℝ) with infinite covolume
en-US/ˈθɪn ˈsʌbˌɡɹup/
en-GB/ˈθɪn ˈsʌbɡɹuːp/
given a real semisimple algebraic group G, a descrete Zariski-dense subgroup of G(ℝ) with infinite covolume