@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

<http://www.irandoc.acir/onto/irandoc/math0004457>
  skos:prefLabel "نظریه حلقه‌های تعویض‌نا‌پذیر"@fa, "non-commutative ring theory"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/math0004432> .

<http://www.irandoc.acir/onto/irandoc/math0004432>
  skos:broader <http://www.irandoc.acir/onto/irandoc/math0004457> ;
  skos:prefLabel "حلقه شبه گاوسی"@fa, "semi-gaussian ring"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .