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Browsing by Author "Stern, Ronald J."

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Browsing by Author "Stern, Ronald J."

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  • Semiconcavity of the bilateral minimal time function 
    Nour, Chadi; Stern, Ronald J. (2016-03-30)
    For a linear control system, we provide conditions under which the bilateral minimal time function T(⋅,⋅) is semiconcave near a given point (α,β). A semiconvexity result of Nour [C. Nour, The bilateral minimal time function, ...
  • The union of uniform closed balls conjecture 
    Nour, Chadi; Stern, Ronald J.; Takche, Jean (2016-03-30)
    The exterior sphere condition is compared to proximal smoothness, and examples are provided, which show that the two properties are not necessarily equivalent. Then conditions are given under which equivalence holds, ...