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SUMMARY:Youlin Li (Shanghai Jiao Tong University\, China)
DTSTART:20210129T120000Z
DTEND:20210129T124000Z
DTSTAMP:20260404T111323Z
UID:GTWorkshopTurkeyII/1
DESCRIPTION:Title: <a href="https://stable.researchseminars.org/talk/GTWor
 kshopTurkeyII/1/">Symplectic fillings of lens spaces and Seifert fibered s
 paces</a>\nby Youlin Li (Shanghai Jiao Tong University\, China) as part of
  Geometry & Topology Workshop Turkey II\n\n\nAbstract\nWe apply Menke's JS
 J decomposition for symplectic fillings to several families of contact 3-m
 anifolds. Among other results\, we complete the classification up to orien
 tation-preserving diffeomorphism of strong symplectic fillings of lens spa
 ces. For large families of contact structures on Seifert fibered spaces ov
 er S^2\, we reduce the problem of classifying symplectic fillings to the s
 ame problem for universally tight or canonical contact structures. We show
  that fillings of contact manifolds obtained by surgery on certain Legendr
 ian negative cables are the result of attaching a symplectic 2-handle to a
  filling of a lens space. This is joint work with Austin Christian.\n
LOCATION:https://stable.researchseminars.org/talk/GTWorkshopTurkeyII/1/
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SUMMARY:Irena Matkovic (University of Oxford\, England)
DTSTART:20210129T130000Z
DTEND:20210129T134000Z
DTSTAMP:20260404T111323Z
UID:GTWorkshopTurkeyII/2
DESCRIPTION:Title: <a href="https://stable.researchseminars.org/talk/GTWor
 kshopTurkeyII/2/">Non-loose negative torus knots</a>\nby Irena Matkovic (U
 niversity of Oxford\, England) as part of Geometry & Topology Workshop Tur
 key II\n\n\nAbstract\nThe Legendrian invariant in knot Floer homology\, de
 fined by Lisca\, Ozsváth\, Stipsicz and Szabó\, is torsion for knots in 
 overtwisted structures\, and it is non-zero only if the knot is strongly n
 on-loose as a transverse knot. Using a correspondence between the knot inv
 ariants and invariants of contact surgeries\, I will show that strongly no
 n-loose transverse realizations of negative torus knots are classified by 
 their invariants and that their U-torsion order equals one.\n
LOCATION:https://stable.researchseminars.org/talk/GTWorkshopTurkeyII/2/
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BEGIN:VEVENT
SUMMARY:Marc Kegel (Humboldt University Berlin\, Germany)
DTSTART:20210129T140000Z
DTEND:20210129T144000Z
DTSTAMP:20260404T111323Z
UID:GTWorkshopTurkeyII/3
DESCRIPTION:Title: <a href="https://stable.researchseminars.org/talk/GTWor
 kshopTurkeyII/3/">Contact surgery numbers</a>\nby Marc Kegel (Humboldt Uni
 versity Berlin\, Germany) as part of Geometry & Topology Workshop Turkey I
 I\n\n\nAbstract\nThe surgery number of a 3-manifold M is the minimal numbe
 r of components in a surgery description of M. Computing surgery numbers i
 s in general a difficult task and is only done in a few cases. In this tal
 k\, I want to report on the same question for contact manifolds. In partic
 ular\, we will study a method to compute contact surgery numbers for conta
 ct structures on some Brieskorn spheres. This talk is based on joint work 
 with John Etnyre and Sinem Onaran.\n
LOCATION:https://stable.researchseminars.org/talk/GTWorkshopTurkeyII/3/
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