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

<http://www.irandoc.acir/onto/irandoc/MAT0006666>
  skos:related <http://www.irandoc.acir/onto/irandoc/MAT0006669> ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/MAT0006668> ;
  skos:prefLabel "مسئله دوهمساز نوع اول"@fa, "biharmonic problem of the first kind"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .

<http://www.irandoc.acir/onto/irandoc/MAT0006669>
  skos:prefLabel "معادله دوهمساز نوع اول"@fa, "biharmonic equation of the first kind"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/MAT0006666> .

<http://www.irandoc.acir/onto/irandoc/MAT0006668>
  skos:prefLabel "مسئله دوهمساز"@fa, "biharmonic problem"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/MAT0006666> .