22 citations · 69 across the 21 of their papers we have counts for
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math.OC2011
Exterior sphere condition and time optimal control for differential inclusions
Piermarco Cannarsa, Khai T. Nguyen
The minimum time function of smooth control systems is known to be locally semiconcave provided Petrov's controllability condition is satisfied. Moreover, such a regular…
math.OC2011
On the Minimum Time Function Around the Origin
Giovanni Colombo, Khai Tien Nguyen
We deal with finite dimensional linear and nonlinear control systems. If the system is linear and autonomous and satisfies the classical normality assumption, we improve the well k…
math.AP2011
Singular gradient flow of the distance function and homotopy equivalence
Paolo Albano, Piermarco Cannarsa, Khai Tien Nguyen +1
It is a generally shared opinion that significant information about the topology of a bounded domain of a riemannian manifold is encoded into the properties of the distance…