@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:-W4FQN955-1
  a skos:Concept ;
  skos:prefLabel "nombre d'argent"@fr, "silver ratio"@en ;
  skos:definition """L'appellation nombre d'argent , ou proportion d'argent, a été proposée pour diverses généralisations du nombre d'or ; la plus courante est celle qui fait du nombre d'argent le deuxième nombre métallique. 
<br/>(Wikipedia, L'Encylopédie Libre, <a href="https://fr.wikipedia.org/wiki/Nombre_d%27argent">https://fr.wikipedia.org/wiki/Nombre_d%27argent</a>)"""@fr, """In mathematics, two quantities are in the <b>silver ratio</b> (or <b>silver mean</b>) if the ratio of the smaller of those two quantities to the larger quantity is the same as the ratio of the larger quantity to the sum of the smaller quantity and twice the larger quantity (see below). This defines the silver ratio as an irrational mathematical constant, whose value of one plus the square root of 2 is approximately 2.4142135623. Its name is an allusion to the golden ratio; analogously to the way the golden ratio is the limiting ratio of consecutive Fibonacci numbers, the silver ratio is the limiting ratio of consecutive Pell numbers. The silver ratio is denoted by <span class="texhtml"><i>δ<sub>S</sub></i></span>. 
<br/>(Wikipedia, The Free Encyclopedia, <a href="https://en.wikipedia.org/wiki/Silver_ratio">https://en.wikipedia.org/wiki/Silver_ratio</a>)"""@en ;
  skos:exactMatch <https://fr.wikipedia.org/wiki/Nombre_d%27argent>, <https://en.wikipedia.org/wiki/Silver_ratio> ;
  skos:broader psr:-WX8H0134-J, psr:-RBFVN7DN-2 ;
  skos:altLabel "silver mean"@en, "proportion d'argent"@fr ;
  dc:created "2023-08-03"^^xsd:date ;
  skos:inScheme psr: ;
  dc:modified "2024-10-18"^^xsd:date .

psr:-WX8H0134-J
  skos:prefLabel "nombre irrationnel"@fr, "irrational number"@en ;
  a skos:Concept ;
  skos:narrower psr:-W4FQN955-1 .

psr:-RBFVN7DN-2
  skos:prefLabel "mathematical constant"@en, "constante mathématique"@fr ;
  a skos:Concept ;
  skos:narrower psr:-W4FQN955-1 .