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

<http://www.irandoc.acir/onto/irandoc/math0006908>
  skos:prefLabel "معادلات دیفرانسیل معمولی مرتبه ی دوم"@fa, "second order ordinary differential equation"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:narrower <http://www.irandoc.acir/onto/irandoc/math0006878> .

<http://www.irandoc.acir/onto/irandoc/math0006878>
  skos:altLabel "معادله قطب مغناطیسی"@fa, "" ;
  skos:related <http://www.irandoc.acir/onto/irandoc/math0008205> ;
  skos:broader <http://www.irandoc.acir/onto/irandoc/math0006908> ;
  skos:prefLabel "معادله دیفرانسیل قطب مغناطیسی"@fa, "magnetic pole differential equation"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept .

<http://www.irandoc.acir/onto/irandoc/math0008205>
  skos:prefLabel "اپتیک غیر خطی"@fa, "non-linear optics"@en ;
  a <http://www.irandoc.ac.ir/onto/irandoc-meta/Concept>, skos:Concept ;
  skos:related <http://www.irandoc.acir/onto/irandoc/math0006878> .