Université de Sherbrooke
30 septembre 2016 de 16 h 00 à 18 h 00 (heure de Montréal/HNE) Sur place
Various auxiliary structures arise naturally in lowdimensions. I will discuss three of these: leftorders on the fundamental group, taut foliations on threemanifolds, and nontrivial Floer homological invariants. Perhaps surprisingly, for (closed, connected, orientable, irreducible) threemanifolds, it has been conjectured that the existence of any one of these structures implies the others. I will describe what is currently known about this conjectural relationship, as well as some of the machinery — particularly in Heegaard Floer theory — that has been developed in pursuit of the conjecture.
AdresseUQAM, Pavillon Président-Kennedy, 201, ave du Président-Kennedy, salle PK5115