Kent State University (800 E Summit St, Kent, Ohio, OH 44240, États-Unis - United States)
Abstract : Let us define, for a compact set A ⊂ R n , the Minkowski averages of A: A(k) = a 1 + · · · + a k k : a 1 ,. .. , a k ∈ A = 1 k A + · · · + A k times. We study the monotonicity of the convergence of A(k) towards the convex hull of A, when considering the Hausdorff distance, the volume deficit and a non-convexity index of Schneider as measures of convergence. For the volume deficit, we show that monotonicity fails in general, thus disproving a conjecture of Bobkov, Madiman and Wang. For Schneider's non-convexity index, we prove that a strong form of monotonicity holds, and for the Hausdorff distance, we establish that the sequence is eventually nonincreasing.
https://hal-upec-upem.archives-ouvertes.fr/hal-01590072
Contributor : Matthieu Fradelizi
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Submitted on : Tuesday, September 19, 2017 - 12:32:21 PM
Last modification on : Friday, October 4, 2019 - 1:36:04 AM
