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SUMMARY:Aaron Landesman (Stanford)
DTSTART:20201030T190000Z
DTEND:20201030T200000Z
DTSTAMP:20260407T215014Z
UID:agstanford/26
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/agstanford/2
 6/">The Torelli map restricted to the hyperelliptic locus</a>\nby Aaron La
 ndesman (Stanford) as part of Stanford algebraic geometry seminar\n\n\nAbs
 tract\nThe classical Torelli theorem states that the Torelli map\, sending
  a curve to\nits Jacobian\, is injective on points. However\, the Torelli 
 map is not injective \non tangent spaces at points corresponding to hypere
 lliptic curves. This leads to\nthe natural question: If one restricts the 
 Torelli map to the locus of\nhyperelliptic curves\, is it then an immersio
 n?\n\nWe give a complete answer to this question\, starting out by describ
 ing the\nclassical history and several surprising foundational gaps in the
 \nliterature. Along the way\, we will learn about Shinichi Mochizuki's val
 uative\ncriterion for locally closed immersions and its relation to Brian 
 Conrad's\nlibrary app idea.\n\nThe discussion for Aaron Landesman’s talk
  is taking place not in zoom-chat\, but at   https://tinyurl.com/2020-10-3
 0-al  (and will be deleted after ~3-7 days).\n
LOCATION:https://researchseminars.org/talk/agstanford/26/
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