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SUMMARY  We present a fast numerical algorithm for large scale zero‐sum stochastic games with perfect information, which combines policy iteration and algebraic multigrid methods. This algorithm can be applied either to a true finite state space zero‐sum two‐player game or to the discretization of an Isaacs equation. We present numerical tests on discretizations of Isaacs equations or variational inequalities. We also present a full multilevel policy iteration, similar to full multigrid algorithm (FMG), which allows one to improve substantially the computation time for solving some variational inequalities. Copyright © 2012 John Wiley & Sons, Ltd.

Multigrid methods for two‐player zero‐sum stochastic games