Abstract
We study the optimal control problem of minimizing the convergence time in the discrete Hegselmann-Krause model of opinion dynamics. The underlying model is extended with a set of strategic agents that can freely place their opinion at every time step. Indeed, if suitably coordinated, the strategic agents can significantly lower the convergence time of an instance of the Hegselmann-Krause model. We give several lower and upper worst-case bounds for the convergence time of a Hegselmann-Krause system with a given number of strategic agents, while still leaving some gaps for future research.
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