In this paper we model the role of a government of a large population as a mean field optimal control problem. Such control problems are constrained by a PDE of continuity-type, governing the dynamics of the probability distribution of the agent population. We show the existence of mean field optimal controls both in the stochastic and deterministic setting. We derive rigorously the first order optimality conditions useful for numerical computation of mean field optimal controls. We introduce a novel approximating hierarchy of sub-optimal controls based on a Boltzmann approach, whose computation requires a very moderate numerical complexity with respect to the one of the optimal control. We provide numerical experiments for models in opinion formation comparing the behavior of the control hierarchy.
Bibliographical noteFunding Information:
G.A., Y.P.C., and M.F. acknowledge the support of the ERC-Starting Grant HDSPCONTR “High-Dimensional Sparse Optimal Control”. Y.P.C. is also supported by the Alexander Humboldt Foundation through the Humboldt Research Fellowship for Postdoctoral Researchers. D.K. acknowledges the support of the ERC-Advanced Grant OCLOC “From Open-Loop to Closed-Loop Optimal Control of PDEs”.
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All Science Journal Classification (ASJC) codes
- Control and Optimization
- Applied Mathematics