Giordano Vitale

Giordano Vitale or Vitale Giordano (born Bitonto, 15 October 1633 – 3 November 1711) was an Italian mathematician. He is best known for his theorem on Saccheri quadrilaterals. He may also be referred to as Vitale Giordani, Vitale Giordano da Bitonto, and simply Giordano.