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

<http://www.irandoc.acir/onto/irandoc/mathpro956>
  skos:prefLabel "نظریه قضیه معادلات دیفرانسیل"@fa, "theorem theory of differential equations"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/mathpro985> .

<http://www.irandoc.acir/onto/irandoc/mathpro985>
  skos:broader <http://www.irandoc.acir/onto/irandoc/mathpro956> ;
  skos:prefLabel "قضیه وجود"@fa, "existence theorem"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .