Mathematics Colloquia and Seminars
Exotic real projective Dehn surgery spaceGeometry/Topology
|Speaker:||Jeff Danciger, University of Texas, Austin|
|Start time:||Tue, Apr 9 2019, 1:30PM|
We study properly convex real projective structures on closed 3-manifolds. A hyperbolic structure is one special example, and in some cases the hyperbolic structure may be deformed non-trivially as a convex projective structure. However, such deformations seem to be exceedingly rare. By contrast, we show that many closed hyperbolic manifolds admit a second convex projective structure not obtained through deformation. We find these examples through a theory of properly convex projective Dehn filling, generalizing Thurston’s picture of hyperbolic Dehn surgery space. Joint work with Sam Ballas, Gye-Seon Lee, and Ludovic Marquis.