@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: a skos:ConceptScheme .
psr:-R4K7LCZ9-1
  skos:altLabel "variété sasakienne"@fr, "Sasakian manifold"@en ;
  skos:prefLabel "variété de Sasaki"@fr, "Sasaki manifold"@en ;
  dc:modified "2023-07-26"^^xsd:date ;
  skos:definition """In differential geometry, a Sasakian manifold (named after Shigeo Sasaki) is a contact manifold <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\\\\displaystyle (M,\\	heta )}">
         <semantics>
         <mrow class="MJX-TeXAtom-ORD">
         <mstyle displaystyle="true" scriptlevel="0">
         <mo stretchy="false">(</mo>
         <mi>M</mi>
         <mo>,</mo>
         <mi>θ<!-- θ --></mi>
         <mo stretchy="false">)</mo>
         </mstyle>
         </mrow>
         <annotation encoding="application/x-tex">{\\\\displaystyle (M,\\	heta )}</annotation>
         </semantics>
         </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/b904de758c42f6a43f77340d40084c7b95bdd49f" class="mwe-math-fallback-image-inline mw-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:6.376ex; height:2.843ex;" alt="(M,\\	heta)"></span> equipped with a special kind of Riemannian metric <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\\\\displaystyle g}">
         <semantics>
         <mrow class="MJX-TeXAtom-ORD">
         <mstyle displaystyle="true" scriptlevel="0">
         <mi>g</mi>
         </mstyle>
         </mrow>
         <annotation encoding="application/x-tex">{\\\\displaystyle g}</annotation>
         </semantics>
         </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/d3556280e66fe2c0d0140df20935a6f057381d77" class="mwe-math-fallback-image-inline mw-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:1.116ex; height:2.009ex;" alt="g"></span>, called a <i>Sasakian</i> metric.
<br/>(Wikipedia, The Free Encyclopedia, <a href="https://en.wikipedia.org/wiki/Sasakian_manifold">https://en.wikipedia.org/wiki/Sasakian_manifold</a>)"""@en ;
  skos:exactMatch <https://en.wikipedia.org/wiki/Sasakian_manifold> ;
  a skos:Concept ;
  skos:inScheme psr: ;
  skos:broader psr:-MTMMQN9D-P .

psr:-MTMMQN9D-P
  skos:prefLabel "contact geometry"@en, "géométrie de contact"@fr ;
  a skos:Concept ;
  skos:narrower psr:-R4K7LCZ9-1 .