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DTSTART:19810329T020000
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UID:news632@dmi.unibas.ch
DTSTAMP;TZID=Europe/Zurich:20190121T142447
DTSTART;TZID=Europe/Zurich:20180313T103000
SUMMARY:Seminar Algebra and Geometry: Konstantin Shramov (HSE Moscow)
DESCRIPTION:I will speak about finite groups acting by birational automorph
 isms of  surfaces over algebraically non-closed fields\, mostly function f
 ields.  One of important observations here is thata smooth geometrically  
 rational surface S is either birational to a product of a projective  line
  and a conic (in particular\, S is rational provided that it has a  point)
 \, or finite subgroups of its birational automorphism group are  bounded. 
 We will also discuss some particular types of surfaces with interesting au
 tomorphism groups\, including Severi-Brauer surfaces.
X-ALT-DESC: I will speak about finite groups acting by birational automorph
 isms of  surfaces over algebraically non-closed fields\, mostly function f
 ields.  One of important observations here is thata smooth geometrically  
 rational surface S is either birational to a product of a projective  line
  and a conic (in particular\, S is rational provided that it has a  point)
 \, or finite subgroups of its birational automorphism group are  bounded.<
 br /> We will also discuss some particular types of surfaces with interest
 ing automorphism groups\, including Severi-Brauer surfaces. 
DTEND;TZID=Europe/Zurich:20180313T120000
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