1963-. Israeli-American mathematician.
Co-authored "Markov Chains and Mixing Times" with David Levin and Elizabeth Wilmer, establishing the modern theory of random walk convergence on graphs.
Proved fundamental results connecting mixing times, spectral gaps, and geometric properties of graphs.
His work on random walks, percolation, and Brownian motion provides the theoretical framework for analyzing convergence of focus flow in cyber.
Former principal researcher at Microsoft Research, professor at UC Berkeley.
Contributed over 300 papers spanning probability, ergodic theory, combinatorics, and theoretical computer science.