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UID:news700@dmi.unibas.ch
DTSTAMP;TZID=Europe/Zurich:20190207T205023
DTSTART;TZID=Europe/Zurich:20150424T103000
SUMMARY:Seminar Algebra and Geometry: Mathieu Huruguen (EPFL\, Lausanne)
DESCRIPTION:A linear algebraic group G defined over a field k is called spe
 cial if every G-torsor over every field extension of k is trivial.  In a m
 odern language\, it can be shown that the special groups are those of esse
 ntial dimension zero.  In 1958 Grothendieck classified special groups in t
 he case where the base field k is algebraically closed.  In this talk I wi
 ll explain the classification of special reductive groups over an arbitrar
 y field.  If time permits\, I will give an application to a conjecture of 
 Serre.
X-ALT-DESC: A linear algebraic group G defined over a field k is called spe
 cial if every G-torsor over every field extension of k is trivial.  In a m
 odern language\, it can be shown that the special groups are those of esse
 ntial dimension zero.  In 1958 Grothendieck classified special groups in t
 he case where the base field k is algebraically closed.  In this talk I wi
 ll explain the classification of special reductive groups over an arbitrar
 y field.  If time permits\, I will give an application to a conjecture of 
 Serre.
DTEND;TZID=Europe/Zurich:20150424T120000
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