Mathematics Colloquia and Seminars

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Description

We discuss and review two different ways of giving mass to the graviton in three dimensions: by adding higher derivative terms to the Einstein action or by adding an explicit (non-linear) mass term. We focus in particular on the issue of whether and how these models can be made supersymmetric. We finally briefly discuss how both models can be viewed as (different) truncations of a bi-metric model of gravity.