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Résumé

We prove the semi-global controllability and stabilization of the $(1+1)-$dimensional wave maps equation with spatial domain đť•Š1 and target $đť•Šk$. First we show that damping stabilizes the system when the energy is strictly below the threshold $2Ď€$, where harmonic maps appear as obstruction for global stabilization. Then, we adapt an iterative control procedure to get low-energy exact controllability of the wave maps equation. This result is optimal in the case $k=1$.

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