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SUMMARY:Generalisation of the tetragonal construction - Lange\, H (Erlange
 n)
DTSTART:20110421T130000Z
DTEND:20110421T140000Z
UID:TALK30896@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:The Donagi conjecture states that the Prym map is injective at
  a double cover of a curve if the curve does not admit a morphism of degre
 e less or equal to 4 onto the projective line. The talk focusses on 2 subj
 ects\, I will explain why the existing proofs of the tetragonal constructi
 on do not generalize and then outline the proof of a generalization which 
 give counterexamples to the conjecture. This is joint work with Elham Izad
 i.\n\n
LOCATION:Seminar Room 1\, Newton Institute
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