@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:-K53WPLV0-Z
  skos:prefLabel "centered square number"@en, "nombre carré centré"@fr ;
  dc:modified "2024-10-18"^^xsd:date ;
  a skos:Concept ;
  skos:exactMatch <https://fr.wikipedia.org/wiki/Nombre_carr%C3%A9_centr%C3%A9>, <https://en.wikipedia.org/wiki/Centered_square_number> ;
  skos:definition """In elementary number theory, a centered square number is a centered figurate number that gives the number of dots in a square with a dot in the center and all other dots surrounding the center dot in successive square layers. That is, each centered square number equals the number of dots within a given city block distance of the center dot on a regular square lattice. While centered square numbers, like figurate numbers in general, have few if any direct practical applications, they are sometimes studied in recreational mathematics for their elegant geometric and arithmetic properties. 
<br/>(Wikipedia, The Free Encyclopedia, <a href="https://en.wikipedia.org/wiki/Centered_square_number">https://en.wikipedia.org/wiki/Centered_square_number</a>)"""@en, """Un nombre carré centré C est un nombre figuré centré qui peut être représenté par C points dans un carré avec un point placé au centre et les autres points disposés en couches carrées concentriques de 4 points, 8 points, 12 points, etc. 
<br/>(Wikipedia, L'Encylopédie Libre, <a href="https://fr.wikipedia.org/wiki/Nombre_carr%C3%A9_centr%C3%A9">https://fr.wikipedia.org/wiki/Nombre_carr%C3%A9_centr%C3%A9</a>)"""@fr ;
  skos:broader psr:-XRXLKWR1-J ;
  skos:inScheme psr: .

psr:-XRXLKWR1-J
  skos:prefLabel "nombre polygonal centré"@fr, "centered polygonal numbers"@en ;
  a skos:Concept ;
  skos:narrower psr:-K53WPLV0-Z .