@prefix psr: <http://data.loterre.fr/ark:/67375/PSR> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix dc: <http://purl.org/dc/terms/> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

psr:-ST8XF8P3-G
  skos:prefLabel "geometric drawing"@en, "construction géométrique"@fr ;
  a skos:Concept ;
  skos:narrower psr:-L87VM4VW-J .

psr: a skos:ConceptScheme .
psr:-RX61SX55-G
  skos:prefLabel "triangle"@fr, "triangle"@en ;
  a skos:Concept ;
  skos:related psr:-L87VM4VW-J .

psr:-L87VM4VW-J
  skos:inScheme psr: ;
  skos:prefLabel "ellipse de Steiner"@fr, "Steiner inellipse"@en ;
  skos:exactMatch <https://fr.wikipedia.org/wiki/Ellipse_de_Steiner>, <https://en.wikipedia.org/wiki/Steiner_inellipse> ;
  skos:definition """In geometry, the Steiner inellipse, midpoint inellipse, or midpoint ellipse of a triangle is the unique ellipse inscribed in the triangle and tangent to the sides at their midpoints. It is an example of an inellipse. By comparison the inscribed circle and Mandart inellipse of a triangle are other inconics that are tangent to the sides, but not at the midpoints unless the triangle is equilateral. The Steiner inellipse is attributed by Dörrie to Jakob Steiner, and a proof of its uniqueness is given by Dan Kalman. 
<br/>(Wikipedia, The Free Encyclopedia, <a href="https://en.wikipedia.org/wiki/Steiner_inellipse">https://en.wikipedia.org/wiki/Steiner_inellipse</a>)"""@en, """En géométrie, l’ellipse de Steiner d'un triangle est l'unique ellipse tangente à chacun des côtés en leur milieu. Elle est nommée en référence au mathématicien suisse Jakob Steiner. 
<br/>(Wikipedia, L'Encylopédie Libre, <a href="https://fr.wikipedia.org/wiki/Ellipse_de_Steiner">https://fr.wikipedia.org/wiki/Ellipse_de_Steiner</a>)"""@fr ;
  skos:altLabel "midpoint ellipse"@en, "midpoint inellipse"@en ;
  dc:modified "2023-08-09"^^xsd:date ;
  a skos:Concept ;
  skos:related psr:-RX61SX55-G ;
  dc:created "2023-08-09"^^xsd:date ;
  skos:broader psr:-ST8XF8P3-G .