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SUMMARY:Arithmetic moduli of Enriques Surfaces - Christian Liedtke (Bonn)
DTSTART:20120502T131500Z
DTEND:20120502T141500Z
UID:TALK37667@talks.cam.ac.uk
CONTACT:Caucher Birkar
DESCRIPTION:We classify Enriques surfaces in positive characteristic\, wit
 h a special focus on\ncharacteristic 2 (the most difficult case). It turns
  out that Enriques surfaces arise in\nevery characteristic as quotients of
  certain complete intersections by finite flat group\nschemes. Using this 
 classification\, we construct the moduli space over the integers\, and\nde
 termine its structure (components\, singularities\, birational geometry). 
 As a byproduct\,\nwe deduce lifting of Enriques surfaces to char. zero.\n
LOCATION:MR 13\, CMS
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