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UID:20250918T140948EDT-7713f15Z5z@132.216.98.100
DTSTAMP:20250918T180948Z
DESCRIPTION:Title: r-point Seshadri constants and the solution to the sympl
 ectic packing problem for P^1 x P^1\n\nAbstract: The symplectic packing pr
 oblem asks how much of the volume of a symplectic manifold M can be filled
  by r disjoint symplectic balls of the same dimension as M.\n\nIf\, asympt
 otically\, one can fill all of the volume one says that there is a full pa
 cking. If not\, one says that there is a packing obstruction.\n\nThe sympl
 ectic packing problem was introduced by McDuff and Polterovich\,\n\nfollow
 ing work of Gromov. If the symplectic manifold is the real\n\n4-manifold u
 nderlying a complex algebraic surface\, then results of McDuff and Poltero
 vich\, and Biran connect the symplectic packing problem with algebraic geo
 metry on that surface. This talk will discuss the complete solution to the
  symplectic packing problem on P^1 x P^1\, using this connection.\n\nOn P^
 1 x P^1 there is more than one choice of symplectic form\, and an interest
 ing feature of the solution is that the answer varies with the form and sh
 ows a surprising dependence on the parity of r.\n\nThis is joint work with
  Chris Dionne.\n\nLocation: In person at UQAM PK-5675 (Zoom available upon
  request)\n\nThe organizers (Joel Kamnitzer\, Jake Levinson\, Steven Lu an
 d Brent Pym)\n\n \n
DTSTART:20240911T190000Z
DTEND:20240911T200000Z
SUMMARY:Mike Roth (Queen's University)
URL:/mathstat/channels/event/mike-roth-queens-universi
 ty-359513
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