Northern California Symplectic Seminar

Past Events

May
06
Date4:00 PM
Location
@ Berkeley
Speaker
Kai Cieliebak (Augsburg University)

Abstract: Every Anosov flow on a closed oriented three-manifold gives rise to a four-dimensional

Liouville domain, whose Liouville homotopy class depends only on the homotopy class of the

Anosov flow. The goal of this talk is to explain this construction and discuss geometric…

May
06
Date2:30 PM
Location
@Berkeley
Speaker
Dun Tang (UC Berkeley)

Abstract: We define the K-theoretical virtual fundamental cycle of an almost complex global

Kuranishi atlas, as an element in the (analytic) orbifold K-homology of the base space of the

atlas, and verify that it defines the same K-theoretical Gromov-Witten invariants as in Abouzaid…

Apr
01
Date4:00 PM
Location
383N
Speaker
Felix Schlenk (Université de Neuchâtel)

Abstract:  Around 2000, Biran introduced the notion of polarization of a symplectic manifold, and showed that the associated Lagrangian skeleta exhibit remarkable rigidity properties. He proved in particular that their complements may have small Gromov width. In this…

Apr
01
Date2:30 PM
Location
380D
Speaker
Yoel Groman (Hebrew University)

Abstract: Consider a Liouville domain D embedded in a closed symplectic manifold M. To D one can associate two types of Floer theoretic invariants: intrinsic ones like the wrapped Fukaya category which depend on D only, and relative ones which involve both D and M. It is often the case…

Mar
04
Date4:00 PM
Location
@Berkeley, room 736 Evans
Speaker
Shaoyun Bai (Columbia University)

Abstract: Take an irrational rotation of the two-sphere; it only has the north and south poles as its periodic points. However, Franks proved that for any area-preserving diffeomorphism of the two-sphere, if it has more than two fixed points, then it must have infinitely many periodic…

Mar
04
Date2:00 PM
Location
@Berkeley (Note earlier start time!), room 736 Evans
Speaker
Roman Krutowski (UCLA)

Abstract: In recent years several groups of authors introduced various invariants that are based on Lagrangian Floer homology of a symmetric product of a symplectic manifold. In this talk, I will introduce Heegaard Floer symplectic cohomology (HFSH), an invariant of a Liouville domain M…

Feb
12
Date4:00 PM
Location
383N
Speaker
Daniel Pomerleano (UMass Boston)

Abstract: The small quantum connection on a monotone symplectic manifold M is one of the simplest objects in enumerative geometry. Nevertheless, the poles of the connection have a very rich structure. After reviewing this background, I will outline a proof that, under suitable…

Feb
12
Date2:30 PM
Location
380W
Speaker
Sheel Ganatra (University of Southern California)

Abstract: Sectorial descent, established in earlier work with Pardon-Shende, gives a local-to-global formula computing the wrapped Fukaya category of a Weinstein manifold from a sectorial cover. If one has a specific fixed global Lagrangian in mind that isn't contained in a single…

Feb
12
Date2:30 PM
Location
380W
Speaker
Sheel Ganatra (University of Southern California)

Abstract: Sectorial descent, established in earlier work with Pardon-Shende, gives a local-to-global formula computing the wrapped Fukaya category of a Weinstein manifold from a sectorial cover. If one has a specific fixed global Lagrangian in mind that isn't contained in a single…

Dec
04
Date4:00 PM
Location
@ UC Berkeley
Speaker
Mohan Swaminathan (Stanford)

Abstract: The moduli space of closed holomorphic curves in a closed symplectic manifold can be compactified using stable maps. However, even in the nicest of situations (e.g., degree d curves of genus g in a complex projective space, with d .. g), counting dimensions shows that most stable maps…