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Epsilon-Fréchet Differentiability of Lipschitz Functions and Applications

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985840%3A_____%2F06%3A00079324" target="_blank" >RIV/67985840:_____/06:00079324 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Epsilon-Fréchet Differentiability of Lipschitz Functions and Applications

  • Original language description

    We study the epsilon-Fréchet differentiability of Lipschitz functions on Asplund generated Banach spaces. We prove a mean valued theorem and its equivalent, a formula for Clarke´s subdifferential, in terms of this concept. We inspect proofs of several statements based on the deep Preiss´s theorem on Fréchet differentiability of Lipschitz functions and we recognize that it is enough to use a simpler lemma on epsilon-Fréchet differentiability due to Fabian and Preiss. We do so for generic differentiability results of Giles and Sciffer, for the existence of nearest points of Borwein and Fitzpatrick, etc. We also show that the epsilon-Fréchet differentiability is separably reducible.

  • Czech name

    Epsilon-fréchetovská diferencovatelnost lipschitzovských funkcí a aplikace

  • Czech description

    Studujeme epsilon-fréchetovskou diferencovatelnost lipschityovských funkcí na asplundovsky generovaných Banachových prostorech. Dokazujeme větu o střední hodnotě a její ekvivalent, formuli pro vyjádření Clarkeho subdiferenciálu a pomocí tohoto pojmu. Ukazujeme, že v řadě důkazů, kde se používá hluboká Preissova věta o diferencovatelnosti konvexních funkcí, se vystačí se slabším pojmem epsilon-fréchetovské diferencovatelnosti a příslušným lemmate Fabiana a Preisse pro tento pojem platící. Je to ukázáno na argumentech podaných Boreinem, Fitzpatrickem, Gillesem, Scifferem, Benyaminim a Lindenstraussem.

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    BA - General mathematics

  • OECD FORD branch

Result continuities

  • Project

    <a href="/en/project/GA201%2F04%2F0090" target="_blank" >GA201/04/0090: Geometrical analysis in Banach spaces II</a><br>

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2006

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Journal of Convex Analysis

  • ISSN

    0944-6532

  • e-ISSN

  • Volume of the periodical

    13

  • Issue of the periodical within the volume

    4

  • Country of publishing house

    DE - GERMANY

  • Number of pages

    15

  • Pages from-to

    695-709

  • UT code for WoS article

  • EID of the result in the Scopus database