Back to Commutative Algebra Seminar: Spring 2026
Commutative Algebra Seminar
Date: Friday, Apr 3, 2026
Time: 2:00PM - 3:00PM
Location: LCB 222
Joint with AG Seminar
Vasudevan Srinivas
University at Buffalo (SUNY and TIFR)
Title |
Some finiteness results for étale fundamental groups in positive characteristics |
Abstract |
This talk will discuss some results on etale fundamental groups of varieties over an algebraically closed field of characteristic p > 0, based on joint work with Hélène Esnault and other coauthors. One result, along with Mark Schusterman, is that the tame fundamental group is finitely presented for such a variety which is the complement of an SNC divisor in a smooth projective variety. A second, along with Jakob Stix, is to give an obstruction for a smooth projective variety to admit a lifting to characteristic 0, in terms of the structure of its etale fundamental group as a profinite group. We will finally touch on some open questions. |
Commutative Algebra