https://en.wikipedia.org/wiki/Projective_linear_group
CopeMaxxer Bronze Joined Sep 4, 2018 Posts 262 Reputation 309 Oct 26, 2018 #1 https://en.wikipedia.org/wiki/Projective_linear_group
Nibba Using HGH at 6'4 Crew Joined Aug 11, 2018 Posts 16,339 Reputation 16,685 Oct 26, 2018 #2 as usual wikipedia uses the word to define itself. jfl at wikicels