Mathematics – Number Theory
Scientific paper
2010-06-16
Mathematics
Number Theory
14 pages
Scientific paper
We compute the Euler-Poincar\'e characteristic of quotients of the
Bruhat-Tits building of PGL(n) under the action of arithmetic groups arising
from central division algebras over rational function fields of positive
characteristic. We use this result to determine the structure of the quotient
simplicial complex in certain cases.
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