@prefix psr: <http://data.loterre.fr/ark:/67375/PSR> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

psr:-Q82KZJNB-3
  skos:prefLabel "paraboloid"@en, "paraboloïde"@fr ;
  a skos:Concept ;
  skos:broader psr:-MS1LS1CS-W .

psr:-BG0121PK-C
  skos:prefLabel "cylindre hyperbolique"@fr, "hyperbolic cylinder"@en ;
  a skos:Concept ;
  skos:broader psr:-MS1LS1CS-W .

psr:-WCS5DV8S-5
  skos:prefLabel "Klein quadric"@en, "quadrique de Klein"@fr ;
  a skos:Concept ;
  skos:broader psr:-MS1LS1CS-W .

psr:-HRR35CLV-W
  skos:prefLabel "cylindre parabolique"@fr, "parabolic cylinder"@en ;
  a skos:Concept ;
  skos:broader psr:-MS1LS1CS-W .

psr:-B2W5CFWL-C
  skos:prefLabel "cône"@fr, "cone"@en ;
  a skos:Concept ;
  skos:broader psr:-MS1LS1CS-W .

psr:-C4BXTZC6-H
  skos:prefLabel "geometric figure"@en, "figure géométrique"@fr ;
  a skos:Concept ;
  skos:narrower psr:-MS1LS1CS-W .

psr:-TZMHRT6K-F
  skos:prefLabel "hyperboloïde"@fr, "hyperboloid"@en ;
  a skos:Concept ;
  skos:broader psr:-MS1LS1CS-W .

psr: a skos:ConceptScheme .
psr:-MS1LS1CS-W
  skos:narrower psr:-BQXPQTXX-2, psr:-TZMHRT6K-F, psr:-X85GRS33-Z, psr:-Q82KZJNB-3, psr:-KKRSJLFR-M, psr:-WCS5DV8S-5, psr:-ZX70XH0J-G, psr:-B2W5CFWL-C, psr:-CCWZFVTK-D, psr:-BG0121PK-C, psr:-B8GQR8W5-8, psr:-HRR35CLV-W ;
  skos:inScheme psr: ;
  skos:altLabel "surface quadratique"@fr, "quadric surface"@en, "quadric hypersurface"@en ;
  skos:broader psr:-C4BXTZC6-H ;
  skos:prefLabel "quadrique"@fr, "quadric"@en ;
  skos:definition """In mathematics, a quadric or quadric surface (quadric hypersurface in higher dimensions), is a generalization of conic sections (ellipses, parabolas, and hyperbolas). It is a hypersurface (of dimension <i>D</i>) in a (<i>D</i> + 1)-dimensional space, and it is defined as the zero set of an irreducible polynomial of degree two in <i>D</i> + 1 variables; for example, <i>D</i> = 1 in the case of conic sections. When the defining polynomial is not absolutely irreducible, the zero set is generally not considered a quadric, although it is often called a degenerate quadric or a reducible quadric. 
<br/>(Wikipedia, The Free Encyclopedia, <a href="https://en.wikipedia.org/wiki/Quadric">https://en.wikipedia.org/wiki/Quadric</a>)"""@en ;
  a skos:Concept ;
  skos:exactMatch <https://en.wikipedia.org/wiki/Quadric> .

psr:-X85GRS33-Z
  skos:prefLabel "ellipsoïde"@fr, "ellipsoid"@en ;
  a skos:Concept ;
  skos:broader psr:-MS1LS1CS-W .

psr:-ZX70XH0J-G
  skos:prefLabel "circular section"@en, "section circulaire"@fr ;
  a skos:Concept ;
  skos:broader psr:-MS1LS1CS-W .

psr:-BQXPQTXX-2
  skos:prefLabel "conical surface"@en, "surface conique"@fr ;
  a skos:Concept ;
  skos:broader psr:-MS1LS1CS-W .

psr:-KKRSJLFR-M
  skos:prefLabel "cylindre"@fr, "cylinder"@en ;
  a skos:Concept ;
  skos:broader psr:-MS1LS1CS-W .

psr:-CCWZFVTK-D
  skos:prefLabel "hypercone"@en, "hypercône"@fr ;
  a skos:Concept ;
  skos:broader psr:-MS1LS1CS-W .

psr:-B8GQR8W5-8
  skos:prefLabel "elliptic cylinder"@en, "cylindre elliptique"@fr ;
  a skos:Concept ;
  skos:broader psr:-MS1LS1CS-W .