Abstract
A metric projection from the real Hilbert space onto a subset of the boundary of a closed convex (not necessary bounded) set is considered. We show a connection between Lipschitz continuity on some subset of the Hilbert space of operator of metric projection with the Lipschitz constant strictly less than 1 and local strong convexity of the set (in terms of modulus of convexity for intersection of a set and a ball with a small radius).
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