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Article Dans Une Revue ESAIM: Control, Optimisation and Calculus of Variations Année : 2014

Hölder equivalence of the value function for control-affine systems

Résumé

We prove the continuity and the Hölder equivalence w.r.t.\ an Euclidean distance of the value function associated with the $L^1$ cost of the control-affine system $\dot q = \drift(q)+\sum_{j=1}^m u_j f_j(q)$, satisfying the strong Hörmander condition. This is done by proving a result in the same spirit as the Ball-Box theorem for driftless (or sub-Riemannian) systems. The techniques used are based on a reduction of the control-affine system to a linear but time-dependent one, for which we are able to define a generalization of the nilpotent approximation and through which we derive estimates for the shape of the reachable sets. Finally, we also prove the continuity of the value function associated with the $L^1$ cost of time-dependent systems of the form $\dot q = \sum_{j=1}^m u_j f_j^t(q)$.
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Dates et versions

hal-00817300 , version 1 (24-04-2013)
hal-00817300 , version 2 (26-11-2013)

Identifiants

Citer

Dario Prandi. Hölder equivalence of the value function for control-affine systems. ESAIM: Control, Optimisation and Calculus of Variations, 2014, 20 (4), pp.1224 - 1248. ⟨10.1051/cocv/2014014⟩. ⟨hal-00817300v2⟩
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