Essential spunnormal surfaces via tropical geometry

Geometry Topology Seminar
Monday, October 7, 2013 - 14:05
1 hour (actually 50 minutes)
Skiles 006
University of Illinois at Chicago
In a paper published in 2012, Nathan Dunfield and StavrosGaroufalidis gave simple, sufficient conditions for a spunnormal surface tobe essential in a compact, orientable 3-manifold with torus boundary. Thistalk will discuss a generalization of this result which utilizes a theoremfrom tropical geometry.