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Jul 27, 2020 at 6:53 comment added Jianrong Li @user64494, I think it is $\overline{L_5}$ in Adam P. Goucher's comment.
Jul 26, 2020 at 16:40 comment added user64494 See $E5$ in en.wikipedia.org/wiki/Dynkin_diagram .
S Jul 26, 2020 at 14:46 history suggested RobPratt
Added a tag
Jul 26, 2020 at 14:12 comment added Adam P. Goucher The corresponding Coxeter group is paracompact and hyperbolic. Apparently it's called $\overline{L_5}$ and it's mentioned here: en.wikipedia.org/wiki/…
Jul 26, 2020 at 13:58 review Suggested edits
S Jul 26, 2020 at 14:46
Jul 26, 2020 at 13:49 history asked Jianrong Li CC BY-SA 4.0