Directional quasi-/pseudo-normality as sufficient conditions for metric subregularity

Kuang Bai, Jane J. Ye, Jin ZHANG

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

In this paper we study sufficient conditions for metric subregularity of a set-valued map which is the sum of a single-valued continuous map and a locally closed subset. First we derive a sufficient condition for metric subregularity which is weaker than the so-called first-order sufficient condition for metric subregularity (FOSCMS) by adding an extra sequential condition. Then we introduce directional versions of quasi-normality and pseudo-normality which are stronger than the new weak sufficient condition for metric subregularity but weaker than classical quasi-normality and pseudo-normality. Moreover we introduce a nonsmooth version of the second-order sufficient condition for metric subregularity and show that it is a sufficient condition for the new sufficient condition for metric subregularity to hold. An example is used to illustrate that directional pseudo-normality can be weaker than FOSCMS. For the class of set-valued maps where the single-valued mapping is affine and the abstract set is the union of finitely many convex polyhedral sets, we show that pseudo-normality and hence directional pseudo-normality holds automatically at each point of the graph. Finally we apply our results to complementarity and Karush–Kuhn–Tucker systems.

Original languageEnglish
Pages (from-to)2625-2649
Number of pages25
JournalSIAM Journal on Optimization
Volume29
Issue number4
DOIs
Publication statusPublished - 2019

Scopus Subject Areas

  • Software
  • Theoretical Computer Science

User-Defined Keywords

  • Calmness
  • Complementarity systems
  • Directional limiting normal cones
  • Directional pseudo-normality
  • Directional quasi-normality
  • Error bounds
  • Metric subregularity

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