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most citedIsomorphisms of Kac-Moody groups which preserve bounded subgroups

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math.GR2014

Quotients of trees for arithmetic subgroups of PGL2 over a rational function field

Ralf Köhl, Bernhard Mühlherr, Koen Struyve

In this note we compute the fundamental domain of the action on the corresponding Bruhat-Tits tree of the arithmetic subgroup of PGL2 with respect to an arbitrary place of the rati…