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The Geometry of Positive Semidefinite Rank

Elina Robeva, Graduate student, Department of Mathematics, UC-Berkeley

Date and Time: Sep 23, 2015 ( 1:00 PM)
Location: Orchard room (3280) at the Wisconsin Institute for Discovery Building


I will first define positive semidefinite rank and mention some of its applications. We study the set of matrices of given psd rank. This set is semialgebraic. As a first step to giving a semialgebraic description, we describe its boundary. This is ongoing work with Kaie Kubjas and Richard Robinson.