Symplectix 2 octobre 2020

Vendredi 2 octobre 2020 à 10h30, exposé en ligne sur BBB :

 http://bigbluebutton3.imj-prg.fr/b/cla-jeh-jn7

Yuichi Ike (Fujitsu Lab)

Persistence-like distance on Tamarkin category and displacement energy 

Abstract: In this talk, I will talk about relation among the microlocal theory of sheaves, persistence modules, and symplectic geometry. 
The microlocal theory of sheaves due to Kashiwara and Schapira can be regarded as Morse theory with sheaf coefficients.
Recently it has been applied to symplectic geometry, after the pioneering work of Tamarkin. We introduce a persistence-like
distance on Tamarkin sheaf category and prove a stability result with respect to Hamiltonian deformation of sheaves.
Using this result, we propose a sheaf-theoretic method to give a lower bound of the displacement energy of compact subsets
of a cotangent bundle. If time permits, I also explain our recent result on intersection of rational Lagrangian immersions
based on the sheaf-theoretic method. This is a joint work with Tomohiro Asano.

 
A noter, le vendredi à 15h15 heure de Paris : Symplectic Zoominar (CRM-Montreal, Princeton/IAS, Tel Aviv, and Paris):   https://dms.umontreal.ca/~cornea/Seminar.html
 

Symplectix 6 novembre 2020

Vendredi 6 novembre 2020, exposé en ligne (informations plus précises bientôt). 


Surena Hozoori (Georgia Tech)

 

Symplectic Geometry of Anosov Flows in Dimension 3 and Bi-Contact Topology.

Abstract: We give a contact and symplectic geometric characterization of Anosov flows in dimension 3 and set up a framework to use tools from contact and symplectic geometry and topology in the study of questions about Anosov dynamics. If time premits, we will discuss some uniqueness results for the undrlying (bi)-contact structure for an Anosov flow, and/or a characterization of Anosovity based on Reeb flows.
 
A noter, le vendredi à 15h15 heure de Paris : Symplectic Zoominar (CRM-Montreal, Princeton/IAS, Tel Aviv, and Paris):   https://dms.umontreal.ca/~cornea/Seminar.html