Departement Mathematik

Symplectic geometry seminar

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Frühjahrssemester 2022

Datum / Zeit Referent:in Titel Ort
4. April 2022
15:15-16:30 		Jonny Evans
Lancaster University
Details

Symplectic Geometry Seminar

Titel Symplectic cohomology of compound Du Val singularities
Referent:in, Affiliation Jonny Evans, Lancaster University
Datum, Zeit 4. April 2022, 15:15-16:30
Ort 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. Mai 2022
13:30-15:30 		Yasha Eliashberg
Stanford University, ETH-ITS
Details

Symplectic Geometry Seminar

Titel Dynamics of characteristic foliations on hypersurfaces in contact manifolds and contact convexity (after Honda-Huang) - part 1
Referent:in, Affiliation Yasha Eliashberg, Stanford University, ETH-ITS
Datum, Zeit 18. Mai 2022, 13:30-15:30
Ort CLV B 4
ITS building, Claussiusstrasse
Abstract This is part 1 of a series of 2-3 lectures.
Unterlagen 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. Mai 2022
11:00-12:30 		Felix Schlenk
Neauchatel University
Details

Symplectic Geometry Seminar

Titel Symplectic embeddings by almost toric fibrations
Referent:in, Affiliation Felix Schlenk, Neauchatel University
Datum, Zeit 24. Mai 2022, 11:00-12:30
Ort 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. Mai 2022
13:30-15:30 		Yasha Eliashberg
Stanford University, ETH-ITS
Details

Symplectic Geometry Seminar

Titel Dynamics of characteristic foliations on hypersurfaces in contact manifolds and contact convexity (after Honda-Huang) - part 2
Referent:in, Affiliation Yasha Eliashberg, Stanford University, ETH-ITS
Datum, Zeit 25. Mai 2022, 13:30-15:30
Ort CLV B 4
ITS building, Claussiusstrasse
Abstract This is part 2 of a series of lectures.
Unterlagen 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. Juni 2022
13:30-15:30 		Yasha Eliashberg
Stanford University, ETH-ITS
Details

Symplectic Geometry Seminar

Titel Dynamics of characteristic foliations on hypersurfaces in contact manifolds and contact convexity (after Honda-Huang) - part 3
Referent:in, Affiliation Yasha Eliashberg, Stanford University, ETH-ITS
Datum, Zeit 1. Juni 2022, 13:30-15:30
Ort CLV B 4
ITS building, Claussiusstrasse
Abstract This is part 3 of a series of lectures.
Unterlagen 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. Juni 2022
13:30-15:30 		Yasha Eliashberg
Stanford University, ETH-ITS
Details

Symplectic Geometry Seminar

Titel Dynamics of characteristic foliations on hypersurfaces in contact manifolds and contact convexity (after Honda-Huang) - part 4
Referent:in, Affiliation Yasha Eliashberg, Stanford University, ETH-ITS
Datum, Zeit 8. Juni 2022, 13:30-15:30
Ort 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

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