@prefix psr: <http://data.loterre.fr/ark:/67375/PSR> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix dc: <http://purl.org/dc/terms/> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

psr:-CG7L0LZB-F
  skos:prefLabel "acnode"@en, "acnode"@fr ;
  a skos:Concept ;
  skos:broader psr:-LKLF0XP4-T .

psr: a skos:ConceptScheme .
psr:-MGJVTWX1-0
  skos:prefLabel "espace topologique"@fr, "topological space"@en ;
  a skos:Concept ;
  skos:narrower psr:-LKLF0XP4-T .

psr:-LKLF0XP4-T
  dc:created "2023-07-21"^^xsd:date ;
  skos:prefLabel "isolated point"@en, "point isolé"@fr ;
  skos:exactMatch <https://fr.wikipedia.org/wiki/Point_isol%C3%A9>, <https://en.wikipedia.org/wiki/Isolated_point> ;
  skos:definition """En topologie, un point <i>x</i> d'un espace topologique <i>E</i> est dit isolé si le singleton {<i>x</i>} est un ouvert. 
<br/>(Wikipedia, L'Encylopédie Libre, <a href="https://fr.wikipedia.org/wiki/Point_isol%C3%A9">https://fr.wikipedia.org/wiki/Point_isol%C3%A9</a>)"""@fr, """In mathematics, a point <span class="texhtml mvar" style="font-style:italic;">x</span> is called an <b>isolated point</b> of a subset <span class="texhtml mvar" style="font-style:italic;">S</span> (in a topological space <span class="texhtml mvar" style="font-style:italic;">X</span>) if <span class="texhtml mvar" style="font-style:italic;">x</span> is an element of <span class="texhtml mvar" style="font-style:italic;">S</span> and there exists a neighborhood of <span class="texhtml mvar" style="font-style:italic;">x</span> that does not contain any other points of <span class="texhtml mvar" style="font-style:italic;">S</span>. This is equivalent to saying that the singleton <span class="texhtml">{<i>x</i>} </span> is an open set in the topological space <span class="texhtml mvar" style="font-style:italic;">S</span> (considered as a subspace of <span class="texhtml mvar" style="font-style:italic;">X</span>). Another equivalent formulation is: an element <span class="texhtml mvar" style="font-style:italic;">x</span> of <span class="texhtml mvar" style="font-style:italic;">S</span> is an isolated point of <span class="texhtml mvar" style="font-style:italic;">S</span> if and only if it is not a limit point of <span class="texhtml mvar" style="font-style:italic;">S</span>.
<br/>(Wikipedia, The Free Encyclopedia, <a href="https://en.wikipedia.org/wiki/Isolated_point">https://en.wikipedia.org/wiki/Isolated_point</a>)"""@en ;
  skos:narrower psr:-CG7L0LZB-F ;
  skos:broader psr:-MGJVTWX1-0 ;
  a skos:Concept ;
  dc:modified "2023-07-21"^^xsd:date ;
  skos:inScheme psr: .