Bharatram Rangarajan is a first year PhD student of mathematics at the Hebrew University of Jerusalem, under the supervision of Alex Lubotzky and Ori Parzanchevski. His research interests lie in the mathematics involved in constructions of expander graphs, Ramanujan graphs and their generalizations to higher dimensions. Previously, he completed his MSc in computer science at Tel Aviv University under the supervision of Amnon Ta-Shma, where he worked on pseudorandomness and coding theory.