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

psr: a skos:ConceptScheme .
psr:-JT89SR84-Q
  skos:prefLabel "quantum group"@en, "groupe quantique"@fr ;
  a skos:Concept ;
  skos:broader psr:-QDLPB3BG-G .

psr:-RHXBWN0G-4
  skos:prefLabel "anneau"@fr, "ring"@en ;
  a skos:Concept ;
  skos:narrower psr:-QDLPB3BG-G .

psr:-QDLPB3BG-G
  skos:narrower psr:-JT89SR84-Q ;
  skos:definition """In mathematics, a noncommutative ring is a ring whose multiplication is not commutative; that is, there exist <i>a</i> and <i>b</i> in the ring such that <i>ab</i> and <i>ba</i> are different. Equivalently, a noncommutative ring is a ring that is not a commutative ring. 
<br/>(Wikipedia, The Free Encyclopedia, <a href="https://en.wikipedia.org/wiki/Noncommutative_ring">https://en.wikipedia.org/wiki/Noncommutative_ring</a>)"""@en ;
  a skos:Concept ;
  skos:inScheme psr: ;
  skos:broader psr:-RHXBWN0G-4 ;
  skos:prefLabel "anneau non commutatif"@fr, "noncommutative ring"@en ;
  skos:exactMatch <https://en.wikipedia.org/wiki/Noncommutative_ring> .