Discrete Geometry and Combinatorics Seminar

Event Date: 

Wednesday, October 26, 2016 - 2:00pm to 3:00pm

Event Location: 

  • South Hall 4607B
Speaker: Steve Trettel

Abstract: We are used to thinking about hyperbolic space using models, partly because they simplify our calculations and partly because we can’t see hyperbolic space from the outside (even the plane doesn’t embed nicely into R^3). However much like stenographically projecting the earth onto a plane ruins the inherent symmetry of a sphere, our models provide us with a highly distorted lens through which to look, and much of how it would actually look or feel to live in a negatively curved world is difficult to recover.

In this talk, I will discuss what kind of things need to be computed to be able to piece together an insider’s view of hyperbolic 3-space, and then take you on a tour of nine different hyperbolic spaces with radii of curvature varying from the size of a galaxy to the size of a person. There are no real prerequisites as I will only be presenting the results of computations rather than the process of computing them, and the goal is to try and teach some hyperbolic geometry in an entertaining way.