Symplectic topology, contact topology and interactions, Paris
from
Monday, April 19, 2021 (8:30 AM)
to
Friday, July 16, 2021 (7:30 PM)
Monday, April 19, 2021
9:00 AM
Spring School on Symplectic and Contact Topology
Spring School on Symplectic and Contact Topology
9:00 AM - 5:00 PM
Room: Amphithéatre Darboux
Tuesday, April 20, 2021
10:00 AM
Spring School on Symplectic and Contact Topology
Spring School on Symplectic and Contact Topology
10:00 AM - 5:00 PM
Room: Amphithéatre Darboux
Wednesday, April 21, 2021
10:00 AM
Spring School on Symplectic and Contact Topology
Spring School on Symplectic and Contact Topology
10:00 AM - 5:00 PM
Room: Amphithéatre Darboux
Thursday, April 22, 2021
10:00 AM
Spring School on Symplectic and Contact Topology
Spring School on Symplectic and Contact Topology
10:00 AM - 5:00 PM
Room: Amphithéatre Darboux
Friday, April 23, 2021
9:00 AM
Spring School on Symplectic and Contact Topology
Spring School on Symplectic and Contact Topology
9:00 AM - 5:00 PM
Room: Amphithéatre Darboux
Saturday, April 24, 2021
Sunday, April 25, 2021
Monday, April 26, 2021
2:00 PM
From Hamiltonian Dynamics to Symplectic Topology (hybrid ENS Paris/CIRM)
From Hamiltonian Dynamics to Symplectic Topology (hybrid ENS Paris/CIRM)
2:00 PM - 6:00 PM
Room: Amphithéatre Darboux
Tuesday, April 27, 2021
2:30 PM
From Hamiltonian Dynamics to Symplectic Topology (hybrid ENS Paris/CIRM)
From Hamiltonian Dynamics to Symplectic Topology (hybrid ENS Paris/CIRM)
2:30 PM - 5:30 PM
Room: Amphithéatre Darboux
Wednesday, April 28, 2021
9:00 AM
From Hamiltonian Dynamics to Symplectic Topology (hybrid ENS Paris/CIRM)
From Hamiltonian Dynamics to Symplectic Topology (hybrid ENS Paris/CIRM)
9:00 AM - 4:00 PM
Room: Amphithéatre Darboux
Thursday, April 29, 2021
2:30 PM
From Hamiltonian Dynamics to Symplectic Topology (hybrid ENS Paris/CIRM)
From Hamiltonian Dynamics to Symplectic Topology (hybrid ENS Paris/CIRM)
2:30 PM - 5:30 PM
Room: Amphithéatre Darboux
Friday, April 30, 2021
2:30 PM
From Hamiltonian Dynamics to Symplectic Topology (hybrid ENS Paris/CIRM)
From Hamiltonian Dynamics to Symplectic Topology (hybrid ENS Paris/CIRM)
2:30 PM - 5:30 PM
Room: Amphithéatre Darboux
Saturday, May 1, 2021
Sunday, May 2, 2021
Monday, May 3, 2021
Tuesday, May 4, 2021
10:00 AM
Courbes holomorphes
Courbes holomorphes
10:00 AM - 12:00 PM
Room: Amphithéatre Darboux
3:00 PM
Varia
Varia
3:00 PM - 6:00 PM
Room: Amphithéatre Darboux
Wednesday, May 5, 2021
Thursday, May 6, 2021
Friday, May 7, 2021
10:45 AM
Symplectix
Symplectix
10:45 AM - 2:45 PM
Room: Amphithéatre Darboux
Contributions
10:45 AM
Compact objects in the Fukaya category and representations of Eliashberg-Chekanov algebra
-
Baptiste Chantraine
(
Université de Nantes
)
1:45 PM
Many real projective spaces are not Liouville fillable
-
Paolo Ghiggini
(
CNRS/Université de Nantes
)
Saturday, May 8, 2021
Sunday, May 9, 2021
Monday, May 10, 2021
Tuesday, May 11, 2021
10:00 AM
Courbes holomorphes
Courbes holomorphes
10:00 AM - 12:00 PM
Room: Amphithéatre Darboux
Wednesday, May 12, 2021
Thursday, May 13, 2021
Friday, May 14, 2021
Saturday, May 15, 2021
Sunday, May 16, 2021
Monday, May 17, 2021
9:00 AM
Advances in Symplectic Topology
Advances in Symplectic Topology
9:00 AM - 5:00 PM
Room: Amphithéatre Darboux
Tuesday, May 18, 2021
9:00 AM
Advances in Symplectic Topology
Advances in Symplectic Topology
9:00 AM - 5:00 PM
Room: Amphithéatre Darboux
Wednesday, May 19, 2021
9:00 AM
Advances in Symplectic Topology
Advances in Symplectic Topology
9:00 AM - 5:00 PM
Room: Amphithéatre Darboux
Thursday, May 20, 2021
9:00 AM
Advances in Symplectic Topology
Advances in Symplectic Topology
9:00 AM - 5:00 PM
Room: Amphithéatre Darboux
Friday, May 21, 2021
9:00 AM
Advances in Symplectic Topology
Advances in Symplectic Topology
9:00 AM - 5:00 PM
Room: Amphithéatre Darboux
Saturday, May 22, 2021
Sunday, May 23, 2021
Monday, May 24, 2021
Tuesday, May 25, 2021
10:30 AM
Courbes holomorphes
Courbes holomorphes
10:30 AM - 12:30 PM
Room: Amphithéatre Darboux
Wednesday, May 26, 2021
Thursday, May 27, 2021
Friday, May 28, 2021
10:45 AM
Symplectix
Symplectix
10:45 AM - 2:45 PM
Room: Amphithéatre Darboux
Contributions
10:45 AM
Bi-invariant Lorentz-Finsler structures on the linear symplectic group and contactomorphism group
-
Alberto Abbondandolo
(
Ruhr-University Bochum
)
1:45 PM
A few properties of Besse contact manifolds
-
Marco Mazzucchelli
Saturday, May 29, 2021
Sunday, May 30, 2021
Monday, May 31, 2021
Tuesday, June 1, 2021
10:30 AM
Courbes holomorphes
Courbes holomorphes
10:30 AM - 12:30 PM
Room: Amphithéatre Darboux
Wednesday, June 2, 2021
Thursday, June 3, 2021
Friday, June 4, 2021
10:45 AM
Symplectix
Symplectix
10:45 AM - 2:45 PM
Room: Amphithéatre Darboux
Contributions
10:45 AM
Rigidity phenomena in Billiard and Hamiltonian Dynamics
-
Alfonso Sorrentino
(
University of Rome Tor Vergata
)
1:45 PM
Around a Question of Entov-Polterovich-Py
-
Yusuke Kawamoto
(
Ecole Normale Superieure
)
Saturday, June 5, 2021
Sunday, June 6, 2021
Monday, June 7, 2021
Tuesday, June 8, 2021
10:30 AM
Courbes holomorphes
Courbes holomorphes
10:30 AM - 12:30 PM
Room: Amphithéatre Darboux
Wednesday, June 9, 2021
Thursday, June 10, 2021
Friday, June 11, 2021
10:45 AM
Symplectix
Symplectix
10:45 AM - 2:45 PM
Room: Amphithéatre Darboux
Contributions
10:45 AM
The genus-one question for open book decomposition
-
Pierre Dehornoy
(
Université Grenoble Alpes
)
1:45 PM
Triangulation and persistence
-
Octav Cornea
(
University of Montreal
)
Saturday, June 12, 2021
Sunday, June 13, 2021
Monday, June 14, 2021
Tuesday, June 15, 2021
10:30 AM
Courbes holomorphes
Courbes holomorphes
10:30 AM - 12:30 PM
Room: Amphithéatre Darboux
Wednesday, June 16, 2021
Thursday, June 17, 2021
Friday, June 18, 2021
10:45 AM
Symplectix
Symplectix
10:45 AM - 2:45 PM
Room: Amphithéatre Darboux
Contributions
10:45 AM
Tropical Fukaya Algebras
-
Sushmita Venugopalan
(
Institute of Mathematical Sciences, Chennai
)
1:45 PM
Khovanov homology and the cinquefoil
-
Steven Sivek
Saturday, June 19, 2021
Sunday, June 20, 2021
Monday, June 21, 2021
Tuesday, June 22, 2021
10:30 AM
Courbes holomorphes
Courbes holomorphes
10:30 AM - 12:30 PM
Room: Amphithéatre Darboux
Wednesday, June 23, 2021
Thursday, June 24, 2021
Friday, June 25, 2021
Saturday, June 26, 2021
Sunday, June 27, 2021
Monday, June 28, 2021
Tuesday, June 29, 2021
3:00 PM
Rabinowitz Floer complex for Lagrangian cobordisms
-
Noémie Legout
(
Uppsala university
)
Rabinowitz Floer complex for Lagrangian cobordisms
Noémie Legout
(
Uppsala university
)
3:00 PM - 4:00 PM
Room: Amphithéatre Darboux
I will define a Floer complex associated to a pair of transverse Lagrangian cobordisms in the symplectization of a contact manifold, by a count of SFT pseudo-holomorphic discs. Then I will show that this complex is endowed with an A_\infty structure. Moreover, I will describe a continuation element in the complex associated to a cobordism L and a small transverse push-off of L.
Wednesday, June 30, 2021
Thursday, July 1, 2021
Friday, July 2, 2021
10:45 AM
String topology and self-intersections
-
Nancy Hingston
(
College of New Jersey
)
String topology and self-intersections
Nancy Hingston
(
College of New Jersey
)
10:45 AM - 11:45 AM
Room: Amphithéatre Darboux
String topology studies the algebraic structure of the homology of the free loop space of a manifold. I'll describe joint work with Nathalie Wahl about string topology operations, and about what these operations compute. We have simplified, chain-level definitions for the "loop" or "string" product and coproduct. The new definitions make possible new links between geometry and loop products. For example, If the k-fold coproduct of a homology class X on LM is nontrivial, then every representative of X contains a loop with a (k+1)-fold self-intersection.
1:45 PM
Symplectic cohomology and ideal valued measures
-
Leonid Polterovich
(
Tel Aviv University
)
Symplectic cohomology and ideal valued measures
Leonid Polterovich
(
Tel Aviv University
)
1:45 PM - 2:45 PM
Room: Amphithéatre Darboux
I will discuss three "big fiber theorems", the Centerpoint Theorem from combinatorics, the Gromov Maximal Fiber Theorem from topology, and the Non-displaceable Fiber Theorem by Entov and myself, from a unified viewpoint provided by Gromov's ideal-valued measures. The latter theory, in the symplectic context, is combined with relative symplectic cohomology developed by Varolgunes, yielding some applications to symplectic rigidity. Necessary preliminaries will be explained. A work in progress with Adi Dickstein, Yaniv Ganor, and Frol Zapolsky.
3:15 PM
Symplectically knotted cubes
-
Felix Schlenk
(
Université de Neuchâtel
)
Symplectically knotted cubes
Felix Schlenk
(
Université de Neuchâtel
)
3:15 PM - 4:15 PM
Room: Amphithéatre Darboux
While by a result of McDuff the space of symplectic embeddings of a closed 4-ball into an open 4-ball is connected, the situation for embeddings of cubes 𝐶4=𝐷2×𝐷2 is very different. For instance, for the open ball 𝐵4 of capacity 1, there exists an explicit decreasing sequence 𝑐1,𝑐2,⋯→1/3 such that for 𝑐<𝑐𝑘 there are at least 𝑘 symplectic embeddings of the closed cube 𝐶4(𝑐) of capacity 𝑐 into 𝐵4 that are not isotopic. Furthermore, there are infinitely many non-isotopic symplectic embeddings of 𝐶4(1/3) into 𝐵4. A similar result holds for several other targets, like the open 4-cube, the complex projective plane, the product of two equal 2-spheres, or a monotone product of such manifolds and any closed monotone toric symplectic manifold. The proof uses exotic Lagrangian tori. This is joint work with Joé Brendel and Grisha Mikhalkin.
Saturday, July 3, 2021
Sunday, July 4, 2021
Monday, July 5, 2021
Tuesday, July 6, 2021
10:30 AM
Courbes holomorphes
Courbes holomorphes
10:30 AM - 12:30 PM
Room: Amphithéatre Darboux
Wednesday, July 7, 2021
Thursday, July 8, 2021
Friday, July 9, 2021
10:45 AM
Orbifold Lagrangian Floer theory
-
Kaoru Ono
(
Research Institute for Mathematical Sciences, Kyoto University
)
Orbifold Lagrangian Floer theory
Kaoru Ono
(
Research Institute for Mathematical Sciences, Kyoto University
)
10:45 AM - 11:45 AM
Room: Amphithéatre Darboux
I will present a set-up for orbifold Lagrangian Floer theory, We introduce the notion of dihedral twisted sectors for Lagrangians, intersections of Lagrangians. Then I explain their role in the construction of Floer theory. It is in collaboration with Bohui Chen and Bai-Ling Wang.
1:45 PM
Non-squeezing of Legendrian knots into neighbourhoods of non-Legendrians and C^0 contactomorphisms
-
Georgios Dimitroglou Rizell
(
Uppsala University
)
Non-squeezing of Legendrian knots into neighbourhoods of non-Legendrians and C^0 contactomorphisms
Georgios Dimitroglou Rizell
(
Uppsala University
)
1:45 PM - 2:45 PM
Room: Amphithéatre Darboux
We discuss joint work with M. Sullivan where we show that a contactomorphism cannot squeeze some fixed Legendrian knot into an arbitrarily small neighbourhood of a non-Legendrian knot, under the additional constraint that the two knots become isotopic inside the neighbourhood, and that the contact manifold is tight. The techniques used are Giroux's theory of convex surfaces combined with Honda's study of solid tori with convex boundary. A corollary is that a smooth image of a Legendrian under a C^0-contactomorphism is again Legendrian (here tightness is not needed).
Saturday, July 10, 2021
Sunday, July 11, 2021
Monday, July 12, 2021
Tuesday, July 13, 2021
10:30 AM
Courbes holomorphes
Courbes holomorphes
10:30 AM - 12:30 PM
Room: Amphithéatre Darboux
3:00 PM
Progress towards new examples of knot-filtered ECH
-
Morgan Weiler
Progress towards new examples of knot-filtered ECH
Morgan Weiler
3:00 PM - 4:00 PM
Room: Amphithéatre Darboux
Knot-filtered embedded contact homology is an invariant of an elliptic Reeb orbit of any contact form for a given contact structure on a closed, oriented three-manifold. It was introduced in a 2016 paper of Hutchings and enables embedded contact homology (ECH) to recover the Calabi invariant of the return map of a global surface of section of the Reeb vector field. Knot-filtered ECH is an invariant of the contact structure rather than the contact form, so it would be interesting to know what features of the contact structure it records. We will explain work in progress with Jo Nelson towards computing the knot filtered ECH of the right- and left-handed trefoil knots as elliptic orbits for different contact structures on S^3.
Wednesday, July 14, 2021
Thursday, July 15, 2021
Friday, July 16, 2021
3:15 PM
The Floer jungle: 35 years of Floer theory
-
Helmut Hofer
(
Institute for Advanced Study, Princeton
)
The Floer jungle: 35 years of Floer theory
Helmut Hofer
(
Institute for Advanced Study, Princeton
)
3:15 PM - 4:15 PM
Room: Amphithéatre Darboux