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DTSTART;VALUE=DATE:20121016T171500
DTEND;VALUE=DATE:20121016T171500
UID:5657@agenda.unifr.ch
DESCRIPTION:In this talk I will discuss recent results about the torsion\nin the cohomology of arithmetic groups with coefficients in \n${\mathbb Z}$-modules. One of the goals is to determine the growth of the \ntorsion if the rank of the  ${\mathbb Z}$-module tends to infinity. In many\ncases it grows exponentially with exponent proportional to the covolume.\nThe method is analytic and is based on the study of the Reidemeister torsion of\nthe locally symmetric space associated to the arithmetic group. If time \npermits I will also discuss related results of Bergeron and Venkatesh, who \nstudy the opposite case where the module is fixed and the group runs through\na family of congruence subgroups.\n<br> [invited by R. Kellerhals]
SUMMARY:Werner Mueller (Bonn): The asymptotic growth of torsion in the cohomology of arithmetic groups
CATEGORIES:Colloque / Congrès / Forum
LOCATION:PER 08\, Phys 2.52\, Chemin du Musée 3\, 1700 Fribourg
URL;VALUE=URI:https://agenda.unifr.ch/e/fr/5657
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