A new sub differential in quasiconvex analysis

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We introduce a new notion of subdifferential, which we call Q-subdifferential, for functions defined on subsets of normed spaces. The Q-subdifferential is a subset of the Greenbeg-Pierskalla quasi-subdifferential and is therefore useful in quasiconvex analysis. © Heldermann Verlag.
Original languageEnglish
Pages (from-to)1-11
JournalJournal of Convex Analysis
Issue number1
Publication statusPublished - 1 Dec 1999


  • Fréchet subdifferential
  • Greenberg-Pierskalla quasi-subdifferential
  • Quasiconvexity


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