@prefix psr: <http://data.loterre.fr/ark:/67375/PSR> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

psr:-HV084N3C-L
  skos:prefLabel "Sard's theorem"@en, "théorème de Sard"@fr ;
  a skos:Concept ;
  skos:broader psr:-R6THHLSB-1 .

psr:-TGQGLV65-R
  skos:prefLabel "elliptic singularity"@en, "singularité elliptique"@fr ;
  a skos:Concept ;
  skos:broader psr:-R6THHLSB-1 .

psr:-Q10Q14NT-1
  skos:prefLabel "topologie différentielle"@fr, "differential topology"@en ;
  a skos:Concept ;
  skos:narrower psr:-R6THHLSB-1 .

psr:-GB2S77WS-S
  skos:prefLabel "tacnode"@en, "tacnode"@fr ;
  a skos:Concept ;
  skos:broader psr:-R6THHLSB-1 .

psr: a skos:ConceptScheme .
psr:-CG7L0LZB-F
  skos:prefLabel "acnode"@en, "acnode"@fr ;
  a skos:Concept ;
  skos:broader psr:-R6THHLSB-1 .

psr:-R6THHLSB-1
  skos:prefLabel "théorie des singularités"@fr, "singularity theory"@en ;
  skos:narrower psr:-GB2S77WS-S, psr:-W3CGQCLX-L, psr:-Z6JMT0X8-B, psr:-CG7L0LZB-F, psr:-TGQGLV65-R, psr:-HV084N3C-L ;
  skos:exactMatch <https://en.wikipedia.org/wiki/Singularity_theory>, <https://fr.wikipedia.org/wiki/Th%C3%A9orie_des_singularit%C3%A9s> ;
  a skos:Concept ;
  skos:definition """In mathematics, singularity theory studies spaces that are almost manifolds, but not quite. A string can serve as an example of a one-dimensional manifold, if one neglects its thickness. A singularity can be made by balling it up, dropping it on the floor, and flattening it. In some places the flat string will cross itself in an approximate "X" shape. The points on the floor where it does this are one kind of singularity, the double point: one bit of the floor corresponds to more than one bit of string. Perhaps the string will also touch itself without crossing, like an underlined "<u>U</u>". This is another kind of singularity. Unlike the double point, it is not stable, in the sense that a small push will lift the bottom of the "U" away from the "underline". 
<br/>(Wikipedia, The Free Encyclopedia, <a href="https://en.wikipedia.org/wiki/Singularity_theory">https://en.wikipedia.org/wiki/Singularity_theory</a>)"""@en, """Dans l'acception que lui a donnée René Thom, la théorie des singularités consiste à étudier des objets et des familles d'objets suivant leur degré de généricité. Dans une famille, l'objet peut subir des changements d'états ce que l'on appelle une bifurcation. 
<br/>(Wikipedia, L'Encylopédie Libre, <a href="https://fr.wikipedia.org/wiki/Th%C3%A9orie_des_singularit%C3%A9s">https://fr.wikipedia.org/wiki/Th%C3%A9orie_des_singularit%C3%A9s</a>)"""@fr ;
  skos:inScheme psr: ;
  skos:broader psr:-Q10Q14NT-1 .

psr:-W3CGQCLX-L
  skos:prefLabel "parapluie de Whitney"@fr, "Whitney umbrella"@en ;
  a skos:Concept ;
  skos:broader psr:-R6THHLSB-1 .

psr:-Z6JMT0X8-B
  skos:prefLabel "rational singularity"@en, "singularité rationnelle"@fr ;
  a skos:Concept ;
  skos:broader psr:-R6THHLSB-1 .