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Supports and extreme points in Lipschitz-free spaces

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21240%2F20%3A00341220" target="_blank" >RIV/68407700:21240/20:00341220 - isvavai.cz</a>

  • Result on the web

    <a href="https://doi.org/10.4171/RMI/1191" target="_blank" >https://doi.org/10.4171/RMI/1191</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.4171/RMI/1191" target="_blank" >10.4171/RMI/1191</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Supports and extreme points in Lipschitz-free spaces

  • Original language description

    For a complete metric space M, we prove that the finitely supported extreme points of the unit ball of the Lipschitz-free space FM are precisely the elementary molecules (δ(p)-δ(q))/d(p,q) defined by pairs of points p,q in M such that the triangle inequality d(p,q)<d(p,r)+d(q,r) is strict for any relementM different from p and q. To this end, we show that the class of Lipschitz-free spaces over closed subsets of M is closed under arbitrary intersections when M has finite diameter, and that this allows a natural definition of the support of elements of FM.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10101 - Pure mathematics

Result continuities

  • Project

    <a href="/en/project/GJ18-00960Y" target="_blank" >GJ18-00960Y: Selected topics in non-linear functional analysis and approximation theory</a><br>

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2020

  • Confidentiality

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

Data specific for result type

  • Name of the periodical

    REVISTA MATEMATICA IBEROAMERICANA

  • ISSN

    0213-2230

  • e-ISSN

  • Volume of the periodical

    36

  • Issue of the periodical within the volume

    7

  • Country of publishing house

    ES - SPAIN

  • Number of pages

    17

  • Pages from-to

    2073-2089

  • UT code for WoS article

    000581669900006

  • EID of the result in the Scopus database

    2-s2.0-85095859947