American mathematician, professor at the University of Oregon.
Co-authored "Markov Chains and Mixing Times" (2009) with Yuval Peres and Elizabeth Wilmer, the standard reference on convergence rates of Markov chains.
The mixing time — how many steps until a random walk approaches its stationary distribution — governs convergence speed for cyberank and the cyber tri-kernel.
His work on coupling arguments and spectral gap analysis provides the tools to bound how quickly focus converges after graph updates.
Research spans probability theory, random walks, and stochastic processes on graphs.