Doron Pudner is  a PhD Student at the Einstein Institute of Mathematics, at the Hebrew University of Jerusalem, under the supervision of Nati Linial. His research  interests are Free Groups: word maps, Aut(F_k), representations, IRS's,Expander Graphs: expansion in random graphs, expansion in Cayley graphs, Ramanujan graphs, Combinatorial and Geometric Group Theory and Combinatorics and Graph Theory