Category Archives: seminar announcement

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

Posted on October 15, 2012 by

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

Posted on October 15, 2012 by

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)

Posted on October 7, 2012 by

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)

Posted on September 25, 2012 by

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

Posted on September 15, 2012 by

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

Posted on April 17, 2012 by

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

Posted on April 1, 2012 by

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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Seminar on Tuesday, March 27: Igor Rivin

Posted on March 24, 2012 by

This Tuesday at 5:00, our very own Igor Rivin is speaking in the seminar. Title: How many ways can you fiber a manifold? Abstract: Can a manifold fiber in more than one way? Can a group be an extension in … Continue reading →

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Seminar on Tuesday, March 20: Genevieve Walsh

Posted on March 18, 2012 by

This Tuesday at 5:00, the seminar hosts Genevieve Walsh of Tufts University. Title: Right-angled Coxeter groups and acute triangulations Abstract: A triangulation of yields a right-angled Coxeter group whose defining graph is the one-skeleton of that triangulation. In this case, … Continue reading →

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Seminar on Tuesday, March 13: Darlan Girao

Posted on March 11, 2012 by

This Tuesday at 5:00, the seminar hosts Darlan Girao of Universidade Federal do Ceara. Title: Rank gradient of hyperbolic 3-manifolds Abstract: An important line of research in 3-dimensional topology is the study of the behavior of the rank of the … Continue reading →

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