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Speaker:

Vladimir Drinfeld
Affiliation:

U. Chicago
Date:

Fri, 2017-06-23 14:00 - 15:00
Location:

MPIM Lecture Hall Let $\Pi$ be the fundamental group of a smooth variety over a finite field. Let $\lambda$ be a non-Archimedean place of the field of algebraic numbers. The philosophy of motives predicts that the $\lambda$-adic pro-semisimple completion of $\Pi$ "does not depend" on $\lambda$. I will try to explain the prediction (which includes a kind of "reciprocity law" involving a sum over all $\ell$-adic cohomology theories). I will also try to explain what can actually be proved.

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