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SUMMARY:Nick Sheridan (Edinburgh)
DTSTART:20200630T140000Z
DTEND:20200630T150000Z
DTSTAMP:20260423T052711Z
UID:Freemath/9
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/Freemath/9/"
 >Symplectic mapping class groups and homological mirror symmetry</a>\nby N
 ick Sheridan (Edinburgh) as part of Free Mathematics Seminar\n\n\nAbstract
 \nI will explain how one can get new information about symplectic mapping 
 class groups by combining two recent results: a proof of homological mirro
 r symmetry for a new collection of K3 surfaces (joint work with Ivan Smith
 )\, together with the computation of the derived autoequivalence group of 
 a K3 surface of Picard rank one (Bayer--Bridgeland). For example\, it is p
 ossible to give an example of a symplectic K3 whose smoothly trivial sympl
 ectic mapping class group (the group of isotopy classes of symplectic auto
 morphisms which are smoothly isotopic to the identity) is infinitely-gener
 ated. This is joint work with Ivan Smith.\n
LOCATION:https://researchseminars.org/talk/Freemath/9/
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