Session S28 - Knots, Surfaces, 3-manifolds

Friday, July 23, 17:20 ~ 17:50 UTC-3

Flows, growth rates and veering triangulations

Yair Minsky

Yale University, United States   -   This email address is being protected from spambots. You need JavaScript enabled to view it.

The work of Thurston, Fried, McMullen, Mosher, Fenley and others weaves together a rich picture of fibrations and flows in 3-manifolds, linking growth rates of orbits, dilatations of pseudo-Anosov maps, and Thurston's norm on homology. Agol and Gueritaud introduced veering triangulations, which are ideal triangulations associated with (certain) pseudo-Anosov flows. We use these triangulations to construct a polynomial invariant that extends McMullen's Teichmuller polynomial from suspension flows to the more general setting. We develop a combinatorial model for the flow which, with the polynomial, permits explicit computations of growth rates of orbits in naturally defined subsets of the flow. As an application we obtain, for a fibered 3-manifold, a description of the limit set of the dilatations of fibrations belonging to a fibered face of Thurston's norm. This is joint work with Michael Landry and Sam Taylor.

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