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SUMMARY:The tropical vertex - Mark Gross (UCSD)
DTSTART:20090428T160000Z
DTEND:20090428T170000Z
UID:TALK13762@talks.cam.ac.uk
CONTACT:Helen Innes
DESCRIPTION:Mirror symmetry is a phenomenon discovered by string theorists
  around 1989\, positing that Calabi-Yau manifolds (conjecturally the three
  complex-dimensional manifolds used to compactify space-time in superstrin
 g theory) come in “mirror” pairs.  Miraculously\, in 1990 Candelas\, d
 e la Ossa\, Green\, and Parkes showed that certain traditionally very hard
 -to-compute data on one manifold (counting holomorphic maps from the Riema
 nn sphere into the Calabi-Yau manifold) could be computed via certain inte
 grals on the other manifold.  There is now a huge industry devoted to unde
 rstanding why this happens.\n\nIn joint work with Rahul Pandharipande and 
 Bernd Siebert\, I will explain a new example of mirror symmetry\, which ha
 s the advantage of being easy to explain and at the same time is believed 
 to lie at the heart of an explanation of mirror symmetry in general. \n\n
LOCATION:Wolfson Room (MR 2) Centre for Mathematical Sciences\, Wilberforc
 e Road\, Cambridge
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