Symplectic geometry seminar

Modal title

Modal content

Spring Semester 2022

Date / Time

Speaker

Title

Location

4 April 2022
15:15-16:30

Jonny Evans
Lancaster University

Event Details

Symplectic Geometry Seminar

Title	Symplectic cohomology of compound Du Val singularities
Speaker, Affiliation	Jonny Evans, Lancaster University
Date, Time	4 April 2022, 15:15-16:30
Location	HG G 43
Abstract	(Joint with Y. Lekili) If someone gives you a variety with a singular point, you can try and get some understanding of what the singularity looks like by taking its “link”, that is you take the boundary of a neighbourhood of the singular point. For example, the link of the complex plane curve with a cusp is a trefoil knot in the 3-sphere. I want to talk about the links of a class of 3-fold singularities which come up in Mori theory: the compound Du Val (cDV) singularities. These links are 5-dimensional manifolds. It turns out that many cDV singularities have the same 5-manifold as their link, and to tell them apart you need to keep track of some extra structure (a contact structure). We use symplectic cohomology to distinguish the contact structures on many of these links.

Symplectic cohomology of compound Du Val singularitiesread_more

HG G 43

* 18 May 2022
13:30-15:30

Yasha Eliashberg
Stanford University, ETH-ITS

Event Details

Symplectic Geometry Seminar

Title	Dynamics of characteristic foliations on hypersurfaces in contact manifolds and contact convexity (after Honda-Huang) - part 1
Speaker, Affiliation	Yasha Eliashberg, Stanford University, ETH-ITS
Date, Time	18 May 2022, 13:30-15:30
Location	CLV B 4 ITS building, Claussiusstrasse
Abstract	This is part 1 of a series of 2-3 lectures.
Assets	Lecture notesfile_download Lecture notes (pass: sgsfs22)file_download

Dynamics of characteristic foliations on hypersurfaces in contact manifolds and contact convexity (after Honda-Huang) - part 1read_more

CLV B 4
ITS building, Claussiusstrasse

* 24 May 2022
11:00-12:30

Felix Schlenk
Neauchatel University

Event Details

Symplectic Geometry Seminar

Title	Symplectic embeddings by almost toric fibrations
Speaker, Affiliation	Felix Schlenk, Neauchatel University
Date, Time	24 May 2022, 11:00-12:30
Location	CLV B 4 ITS building, Claussiusstrasse
Abstract	Symplectic embeddings are at the heart of symplectic geometry, ever since Gromov proved his non-squeezing and camel theorem. Symplectic embedding results give an impression what can be done with a symplectic mapping. Almost toric fibrations of toric symplectic manifolds have recently been applied to symplectic embedding problems, yielding new results or simplifying previous proofs. Among the results are optimal ellipsoid embeddings, the existence of many non-isotopic embeddings of cubes, a new quantification of the non-squeezing theorem, new Lagrangian barriers, ... After a very informal introduction to almost toric fibrations, I will describe a few of these applications. The talk will be made accessible to non-specialists.

Symplectic embeddings by almost toric fibrationsread_more

CLV B 4
ITS building, Claussiusstrasse

* 25 May 2022
13:30-15:30

Yasha Eliashberg
Stanford University, ETH-ITS

Event Details

Symplectic Geometry Seminar

Title	Dynamics of characteristic foliations on hypersurfaces in contact manifolds and contact convexity (after Honda-Huang) - part 2
Speaker, Affiliation	Yasha Eliashberg, Stanford University, ETH-ITS
Date, Time	25 May 2022, 13:30-15:30
Location	CLV B 4 ITS building, Claussiusstrasse
Abstract	This is part 2 of a series of lectures.
Assets	Lecture notesfile_download Lecture notes (pass: sgsfs22)file_download

Dynamics of characteristic foliations on hypersurfaces in contact manifolds and contact convexity (after Honda-Huang) - part 2read_more

CLV B 4
ITS building, Claussiusstrasse

* 1 June 2022
13:30-15:30

Yasha Eliashberg
Stanford University, ETH-ITS

Event Details

Symplectic Geometry Seminar

Title	Dynamics of characteristic foliations on hypersurfaces in contact manifolds and contact convexity (after Honda-Huang) - part 3
Speaker, Affiliation	Yasha Eliashberg, Stanford University, ETH-ITS
Date, Time	1 June 2022, 13:30-15:30
Location	CLV B 4 ITS building, Claussiusstrasse
Abstract	This is part 3 of a series of lectures.
Assets	Lecture notesfile_download Lecture notes (pass: sgsfs22)file_download

Dynamics of characteristic foliations on hypersurfaces in contact manifolds and contact convexity (after Honda-Huang) - part 3read_more

CLV B 4
ITS building, Claussiusstrasse

* 8 June 2022
13:30-15:30

Yasha Eliashberg
Stanford University, ETH-ITS

Event Details

Symplectic Geometry Seminar

Title	Dynamics of characteristic foliations on hypersurfaces in contact manifolds and contact convexity (after Honda-Huang) - part 4
Speaker, Affiliation	Yasha Eliashberg, Stanford University, ETH-ITS
Date, Time	8 June 2022, 13:30-15:30
Location	CLV B 4 ITS building, Claussiusstrasse
Abstract	This is part 4 of a series of lectures.

Dynamics of characteristic foliations on hypersurfaces in contact manifolds and contact convexity (after Honda-Huang) - part 4read_more

CLV B 4
ITS building, Claussiusstrasse

Notes: events marked with an asterisk (*) indicate that the time and/or location are different from the usual time and/or location and if you want you can subscribe to the iCal/ics Calender.

Archive: SS 24 AS 23 SS 23 AS 22 SS 22 SS 21 AS 20 SS 20 AS 19 SS 19 AS 18 SS 18 AS 17 SS 17 AS 16 SS 16 AS 15 SS 15 AS 14 SS 14 AS 13 SS 13 AS 12 SS 12 AS 11 SS 11 AS 10 SS 10 AS 09 WS 03/04 WS 99/00