Minimal time for the exact controllability of one-dimensional first-order linear hyperbolic systems by one-sided boundary controls
Résumé
In this article we study the minimal time for the exact controllability of one-dimensional first-order linear hyperbolic systems when all the controls are acting on the same side of the boundary. We establish an explicit and easy-to-compute formula for this time with respect to all the coupling parameters of the system. This partially solves an open problem raised in the celebrated survey [Rus78] and in the article [Hu15]. The proof relies on the introduction of a canonical UL-decomposition and the compactness-uniqueness method.
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