Monthly Archives: October 2012

Stefan Friedl’s talk at the Geometry/Topology seminar (4pm Tuesday, October 16th)

In 2007, Agol showed that any irreducible 3-manifold such that its fundamental groups is ‘virtually RFRS’ is virtually fibered. I will give a somewhat different proof using complexities of sutured manifolds. This is joint work with Takahiro Kitayama.

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Igor Rivin speaking at the Geometry and Dynamics seminar at Penn State

Igor will be speaking in the Geometry and Dynamics Seminar at Penn State on November 28th, on the topic of “counting curves on usually hyperbolic) surfaces.”

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Igor Rivin speaking at Penn State MASS Colloquium

Igor will be speaking at the MASS Colloquium on November 29th. Watch this space for more details

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Patricia Cahn’s talk at the Geometry/Topology seminar (October 9th, 4pm)

Title: Algebras counting intersections and self-intersections of curves Abstract: Goldman and Turaev discovered a Lie bialgebra structure on the vector space generated by free homotopy classes of loops on an oriented surface. Goldman’s Lie bracket gives a lower bound on … Continue reading

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