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Department of Mathematical Sciences

Seminar Archives

On this page you can find information about seminars in this and previous academic years, where available on the database.

Geometry and Topology Seminar: Tight, non-fillable contact structures on 3-manifolds.

Presented by Andy Wand., Glasgow.

5 November 2015 14:00 in CM221

The modern development of contact geometry in 3 dimensions has seen several (due to Giroux, Wendl, Latschev and Wendl, Hutchings, and others) invariants of contact structures meant in some sense to measure non-(Stein/symplectic)-fillability of the structure. We will describe ongoing work to approach this issue via a refinement of the `contact class' of Heegaard-Floer homology, inspired by the `algebraic torsion' of Latschev and Wendl, and Hutchings (this is joint with Kutluhan, Matic, and Van Horn-Morris).

Contact mark.a.powell@durham.ac.uk or andrew.lobb@durham.ac.uk or wilhelm.klingenberg@durham.ac.uk for more information