@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix isothes: <http://purl.org/iso25964/skos-thes#> .

<https://concepts.sagepub.com/social-science/concept/operational_research>
  skos:prefLabel "operational research"@en ;
  a skos:Concept ;
  skos:narrower <https://concepts.sagepub.com/social-science/concept/mathematical_programming> .

<https://concepts.sagepub.com/social-science/concept/mathematical_programming>
  skos:narrower <https://concepts.sagepub.com/social-science/concept/non_linear_programming>, <https://concepts.sagepub.com/social-science/concept/linear_programming> ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/operational_research> ;
  skos:prefLabel "mathematical programming"@en ;
  a skos:Concept .

<https://concepts.sagepub.com/social-science/concept/conceptgroup/concepts>
  a skos:Collection, isothes:ConceptGroup ;
  skos:prefLabel "concepts"@en ;
  skos:member <https://concepts.sagepub.com/social-science/concept/mathematical_programming> .

<https://concepts.sagepub.com/social-science/concept/linear_programming>
  skos:prefLabel "linear programming"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/mathematical_programming> .

<https://concepts.sagepub.com/social-science/concept/non_linear_programming>
  skos:prefLabel "non linear programming"@en ;
  a skos:Concept ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/mathematical_programming> .