STAGE Seminar

Tuesday, December 13, 2022 at 11:00am to 12:30pm

MIT , 2-449 77 Massachusetts Avenue, Cambridge, MA 02139

Speaker Xinyu Zhou (Boston University)

Title:  The étale-Brauer obstruction and insufficiency of the obstructions

Topics:  The étale-Brauer set; comparison with the descent set; insufficiency of the obstructions for a quadric bundle over a curve.

Reference: Poonen, Rational points on varieties, Sections 8.5.2-8.5.3 and 8.6.2.




To access MIT buildings for a math seminar without MIT's CovidPass, you must be invited via a Tim Ticket ahead of time.  There are no exceptions; please make sure to plan accordingly before coming to campus.  To be able to activate the Tim Ticket, the attendee will need to submit an attestation about vaccination and health status and provide contact info.

Finally, a reminder to all in-person participants, MIT covid policies must be adhered to: remember to keep your mask on while inside buildings, eating food is not allowed within lecture rooms, and if you are feeling sick on the day of the talk, please stay home!


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Events By Interest


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MIT Community, Public

Events By School

School of Science


Bjorn Poonen, stage_sem, Francesc Fité, Hyuk Jun Kweon, Ziquan Yang, Zhiyu Zhang


Department of Mathematics


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