Robert_Zimmer

Robert Jeffrey Zimmer (November 5, 1947 – May 23, 2023) was an American mathematician and academic administrator. From 2006 until 2021, he served as the 13th president of the University of Chicago and as the Chair of the Board for Argonne National Lab, Fermi National Accelerator Laboratory, and the Marine Biological Laboratory. He then served as chancellor of the University of Chicago until July 2022.
As a mathematician, Zimmer specialized in geometry, particularly ergodic theory, Lie groups, and differential geometry.