"1711-11-03Z"^^ . "1711Z"^^ . . . . "Vitale, Giordano"@en . "1633Z"^^ . "Italian mathematician" . "Giordano Vitale or Vitale Giordano (October 15, 1633 \u2013 November 3, 1711) was an Italian mathematician. He is best known for his theorem on Saccheri quadrilaterals. He is also referred to as Vitale Giordani, Vitale Giordano da Bitonto, and simply Giordano."@en . "1633-10-15Z"^^ .