Category Archives: seminar announcement

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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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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Bill Floyd Speaks! (Tuesday, October 2, 4pm)

Speaker: Bill Floyd, Virginia Tech Title: Finite subdivision rules and rational maps Abstract: A finite subdivision rule gives an essentially combinatorial method for recursively subdividing planar complexes. The theory was developed (as part of an approach to Cannon’s conjecture) as … Continue reading

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PATCH mini-conference, Friday, September 21

We have Thomas Koberda (Yale), Eriko Hironaka (Florida State) and Andy Putman (Rice) speaking on things vaguely related to the mapping class group: 2pm: Speaker Thomas Koberda Title: The complex of curves for a right-angled Artin group Abstract: I will … Continue reading

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Seminar on Tuesday, April 17: Jeff Brock

This Tuesday at 5:00, the seminar hosts Jeff Brock of Brown University. Title: Fat, exhausted integer homology spheres Abstract: Since Perelman’s groundbreaking proof of the geometrization conjecture for three-manifolds, the possibility of exploring tighter correspondences between geometric and algebraic invariants … Continue reading

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Seminar on Tuesday, April 3: Scott Wolpert

This Tuesday at 4:30, the seminar hosts Scott Wolpert of the University of Maryland. Title: Weil-Petersson Riemannian and symplectic geometry: geodesic-lengths, Fenchel-Nielsen twists and Thurston shears Abstract: We discuss the correspondence between Weil-Petersson geometry on Teichmuller space and the hyperbolic … Continue reading

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