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Jan 20, 2010 at 16:48 comment added Victor Ostrik Tamas: this is contained in introduction of Lusztig's paper.
Jan 20, 2010 at 16:31 comment added Tamas Hausel Interesting. Any chance to find the result for the character ring of $PGL_2({\mathbb F}_q)$ somewhere explicitly?
Jan 20, 2010 at 16:00 history answered Victor Ostrik CC BY-SA 2.5