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SUMMARY:Symplectic origami: folding and unfolding symplectic manifolds
DTSTART:20120514T141500
DTEND:20120514T150000
DTSTAMP:20260506T015631Z
UID:b749a80eb166f6f2dc54c0f3cabc56ce2d5235560ea018b1066d6ff4
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Ana Cannas da Silva (ETH Zurich)\nAbstract\n\nOrigami m
 anifolds are manifolds equipped with a closed 2-form\nwhich is symplectic 
 except on a hypersurface where the form\nis like the pullback of a symplec
 tic form by a folding map\nand the kernel of the form defines a circle fib
 ration.\n\nWe can move back and forth between (folded) origami manifolds\n
 and (unfolded) symplectic cut manifolds using radial blow-up\n(folding) an
 d cutting (unfolding).  I will explain an origami convexity\ntheorem and
   the classification of origami toric manifolds (by\npolyhedral images re
 sembling paper origami) - these results\nare joint work with V. Guillemin 
 and A. R. Pires.
LOCATION:MA A1 12
STATUS:CONFIRMED
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