Abstracts for the Seminar
 Discrete Geometry and Combinatorics
 Fall 2016

Speaker:  Tony Nixon, University of Lancaster
Title: Unique realisations of graphs on surfaces
Time: 4:20 PM, Tuesday, September 20, 2016 (UNUSUAL DAY and TIME)
Place:  Malott 206

Abstract: In this talk I will consider the global rigidity of bar-joint frameworks in $\mathbb{R}^3$ whose vertices are constrained to lie on a fixed surface. When the surface is a plane or a sphere then generic global rigidity depends only on the graph and the properties of the graph guaranteeing uniqueness (or global rigidity) can be tested efficiently. I will describe these results and then talk about recent work to extend these characterisations to other surfaces.

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