@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:-SKGJ9CKK-N
  skos:prefLabel "géométrie algébrique"@fr, "algebraic geometry"@en ;
  a skos:Concept ;
  skos:narrower psr:-W3CGQCLX-L .

psr: a skos:ConceptScheme .
psr:-P8WJC0B5-K
  skos:prefLabel "surface réglée"@fr, "ruled surface"@en ;
  a skos:Concept ;
  skos:narrower psr:-W3CGQCLX-L .

psr:-W3CGQCLX-L
  dc:modified "2023-10-04"^^xsd:date ;
  skos:broader psr:-P8WJC0B5-K, psr:-R6THHLSB-1, psr:-SKGJ9CKK-N ;
  skos:altLabel "Whitney's umbrella"@en, "Cayley umbrella"@en ;
  skos:inScheme psr: ;
  skos:prefLabel "Whitney umbrella"@en, "parapluie de Whitney"@fr ;
  dc:created "2023-10-04"^^xsd:date ;
  a skos:Concept .

psr:-R6THHLSB-1
  skos:prefLabel "singularity theory"@en, "théorie des singularités"@fr ;
  a skos:Concept ;
  skos:narrower psr:-W3CGQCLX-L .