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SUMMARY:Helge Ruddat (Mainz)
DTSTART:20210527T090000Z
DTEND:20210527T100000Z
DTSTAMP:20260423T005802Z
UID:notts_ag/59
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/notts_ag/59/
 ">Polytopes\, periods\, degenerations</a>\nby Helge Ruddat (Mainz) as part
  of Online Nottingham algebraic geometry seminar\n\n\nAbstract\nA lattice 
 polytope describes a projective toric variety and a regular subdivision of
  the polytope describes a flat degeneration of the toric variety. It is in
 structive to deform the degenerating family in a way that makes the geomet
 ry non-toric and produces a more interesting real torus fibration on the f
 ibres of the degeneration. I am going to explain a simple formula that per
 mits the easy computation of period integrals for the deformed families. T
 his approach to periods doesn't require any differential equations and is 
 flexible enough to give proofs for strong results about Gross-Siebert's de
 generating families obtained from wall structures. The talk is based on jo
 int work with Bernd Siebert.\n
LOCATION:https://researchseminars.org/talk/notts_ag/59/
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