@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:-Q10Q14NT-1
  skos:prefLabel "topologie différentielle"@fr, "differential topology"@en ;
  a skos:Concept ;
  skos:narrower psr:-P005GLV2-W .

psr: a skos:ConceptScheme .
psr:-P005GLV2-W
  skos:definition """The Hopf theorem (named after Heinz Hopf) is a statement in differential topology, saying that the topological degree is the only homotopy invariant of continuous maps to spheres. 
<br/>(Wikipedia, The Free Encyclopedia, <a href="https://en.wikipedia.org/wiki/Hopf_theorem">https://en.wikipedia.org/wiki/Hopf_theorem</a>)"""@en ;
  dc:created "2023-08-02"^^xsd:date ;
  dc:modified "2023-08-02"^^xsd:date ;
  a skos:Concept ;
  skos:inScheme psr: ;
  skos:broader psr:-Q10Q14NT-1 ;
  skos:prefLabel "Hopf theorem"@en, "théorème de Hopf"@fr ;
  skos:exactMatch <https://en.wikipedia.org/wiki/Hopf_theorem> .