Category talk:20th-century mathematicians

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Are subcategories of the following form needed: for example

  • "20th-century Italian mathematicians"
  • "20th-century German mathematicians"

an example for needing this is Giuseppe Peano, who at the moment is in categories Category:Italian mathematicians and Category:20th-century mathematiciansBrad7777 (talk) 15:16, 5 November 2011 (UTC)