Characterizations of Nonsmooth Robustly Quasiconvex Functions

Authors: Bui Thi Hoa, Phạm Duy Khánh, Trần Thị Tú Trinh,

https://doi.org/10.1007/s10957-018-1421-3

Publisher, magazine: ,

Publication year: 2019

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Abstract

Two criteria for the robust quasiconvexity of lower semicontinuous functions are established in terms of Fréchet subdifferentials in Asplund spaces. The first criterion extends to such spaces a result established by Barron et al. (Discrete Contin Dyn Syst Ser B 17:1693–1706, 2012). The second criterion is totally new even if it is applied to lower semicontinuous functions on finite-dimensional spaces.

Tags: Quasiconvexity · Robust quasiconvexity · Quasimonotone · Fréchet subdifferential · Approximate mean value theorem