Hutchings

Thursday, January 26, 2017 - 16:30 to 17:30
Michael Hutchings
two or infinitely many Reeb orbits
Abstract: 

We show that every nondegenerate contact form on a closed connected three-manifold, such that the associated contact structure has torsion first Chern class, has either two or infinitely many simple Reeb orbits. (By previous work, two simple Reeb orbits are possible only when the three-manifold is a sphere or a lens space.) Joint work with Dan Cristofaro-Gardiner and Dan Pomerleano.

Partners

Irmar LMJL ENS Rennes LMBA LAREMA

Affiliation

ANR CNRS Rennes 1 Rennes 2 Nantes INSA Rennes INRIA ENSRennes UBO UBS Angers UBL