Friday, March 4, 2022
Time | Items |
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All day |
|
9am |
03/04/2022 - 9:00am We discuss topics of common interest in the areas of geometry, probability, and combinatorics. Location: |
11am |
03/04/2022 - 11:00am 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. I'll describe some of this picture and talk about some joint work with Michael Landry and Sam Taylor which develops a combinatorial model using the "veering triangulations" of Agol-Gueritaud, which permits some computations and refines our understanding a bit. Location: |
2pm |
03/04/2022 - 2:00pm Abstract: I will describe some examples of complete non-compact Ricci-flat metrics in dimension 4, which are called “gravitational instantons.” In many cases, these can be compactified complex analytically to rational surfaces. I will then discuss how these gravitational instantons can arise from sequences of degenerating Ricci-flat metrics on the compact K3 surface, through a process called “bubbling”. Location: |