BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Yoel Groman (HUJI) DTSTART:20260612T131500Z DTEND:20260612T144500Z DTSTAMP:20260604T102904Z UID:SympZoominar/186 DESCRIPTION:Title: Symplectic excision and distance rigidity\nby Yoel Groman (HUJI ) as part of Symplectic zoominar\n\n\nAbstract\nA symplectic manifold $M$ is called tame at infinity if it admits a compatible almost complex struct ure such that the corresponding Riemannian metric is complete and geometri cally bounded. Some such condition is necessary to confine $J$-holomorphic curves of finite symplectic area. In fact\, the strict geometric boundedn ess condition can be relaxed to a weakly contractible condition that still allows for the same confinement.\n\nBecause there is no distinguished suc h almost complex structure\, we ask: Are there geometric features common t o all of them? We investigate this through the lens of distances between s ubsets of $M$. A non-quantitative version of the same question is: does $M $ remain tame upon excising a subset? We find rigidity phenomena when exci sing symplectic hypersurfaces\, which contrast with the flexibility that o ften occurs when the excised set is coisotropic.\n LOCATION:https://researchseminars.org/talk/SympZoominar/186/ END:VEVENT END:VCALENDAR