Abstract
In this paper, we establish some new characterizations of metric regularity of implicit multifunctions in complete metric spaces by using lower semicontinuous envelopes of the distance functions to set-valued mappings. Through these new characterizations it is possible to investigate implicit multifunction theorems based on coderivatives and on contingent derivatives as well as the perturbation stability of implicit multifunctions.
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Acknowledgments
The authors are indebted to Professors Alexander Kruger and Jiří V. Outrata for their interest and for valuable discussions on this work. Research of Huynh Van Ngai was supported by NAFOSTED and partially by LIA Formath Vietnam and the project BQR Réseaux. B005/R1107005 from the university of Limoges. Research of Nguyen Huu Tron was supported by a doctoral grant from Région Limousin. Research of Michel Théra was partially supported by the project BQR Réseaux. B005/R1107005 from the university of Limoges, by the Australian Research Council under grant DP-110102011 and by the ECOS-SUD C10E08 project.
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Dedicated to J. M. Borwein on the occasion of his sixtieth anniversary.
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Huynh, v.N., Nguyen, H.T. & Théra, M. Implicit multifunction theorems in complete metric spaces. Math. Program. 139, 301–326 (2013). https://doi.org/10.1007/s10107-013-0673-9
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DOI: https://doi.org/10.1007/s10107-013-0673-9