Poincaré series of the Weyl group of elliptic Lie algebras $A^{(1,1)}_1$ and $A^{(1,1) \ast}_1$
Abstract
Description
In this note, we calculate the Poincaré series of elliptic Weyl groups of type $A^{(1,1)}_1$ and $A^{(1,1) \ast}_1$ and show that they have a simple expression.
9 pages, amslatex. A reference on the Bruhat-Tits buildings is added.
9 pages, amslatex. A reference on the Bruhat-Tits buildings is added.