Geodesic
Regularity of Set-Valued Maps and their Selections through Set Differences. Part 1: Lipschitz Continuity
Serdica Mathematical Journal, Tome 39 (2013) no. 3-4, pp. 365-390.

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We introduce Lipschitz continuity of set-valued maps with respect to a given set difference. The existence of Lipschitz selections that pass through any point of the graph of the map and inherit its Lipschitz constant is studied. We show that the Lipschitz property of the set-valued map with respect to the Demyanov difference with a given constant is characterized by the same property of its generalized Steiner selections. For a univariate multifunction with only compact values in R^n, we characterize its Lipschitz continuity in the Hausdorff metric (with respect to the metric difference) by the same property of its metric selections with the same constant. 2010 Mathematics Subject Classification: 54C65, 54C60, 26E25.
Keywords: Lipschitz continuous set-valued maps, selections, generalized Steiner selection, metric selection, set differences, Demyanov metric, Demyanov difference, metric difference 
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     author = {Baier, Robert and Farkhi, Elza},
     title = {Regularity of {Set-Valued} {Maps} and their {Selections} through {Set} {Differences.} {Part} 1: {Lipschitz} {Continuity}},
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Baier, Robert; Farkhi, Elza. Regularity of Set-Valued Maps and their Selections through Set Differences. Part 1: Lipschitz Continuity. Serdica Mathematical Journal, Tome 39 (2013) no. 3-4, pp. 365-390. http://geodesic.mathdoc.fr/item/SMJ2_2013_39_3-4_a10/