Giovanni Girolamo Saccheri (Italian pronunciation: [dʒoˈvanni dʒiˈrɔːlamo sakˈkɛːri]; 5 September 1667 – 25 October 1733) was an Italian Jesuit priest...

Khayyám (12th century), Nasīr al-Dīn al-Tūsī (13th century), and Giovanni Girolamo Saccheri (18th century). The theorems of Ibn al-Haytham, Khayyam and al-Tusi...

Unlike many commentators on Euclid before and after him (including Giovanni Girolamo Saccheri), Khayyám was not trying to prove the parallel postulate as such...

 1230 – c. 1314), Gersonides (1288–1344), Alfonso, John Wallis, and Giovanni Girolamo Saccheri, that by the 19th century led to the discovery of hyperbolic geometry...

Euclid. The theorem is named after Giovanni Girolamo Saccheri and Adrien-Marie Legendre. It appeared in Saccheri's 1733 book Euclides ab omni naevo vindicatus...

politician, Lord Chief Justice of England and Wales (b. 1623) 1733 – Giovanni Girolamo Saccheri, Italian priest, mathematician, and philosopher (b. 1667) 1757...

Riccati Matteo Ricci Michelangelo Ricci Giovanni Girolamo Saccheri Antonio Schinella Conti Evangelista Torricelli Vincenzo Viviani Giovanni Battista Zupi...

Ian Rumfitt (UK, 20th century) Bertrand Russell (UK, 1872–1970) Giovanni Girolamo Saccheri (Italy, 1667–1733) Raghunatha Siromani (India, c. 1477–1547) Gerald...

(1288–1344) Gilbert of Poitiers Gildas, (6th c) Giles of Rome Giovanni Girolamo Saccheri Girolamo Savonarola Gonsalvo of Spain Godfrey of Fontaines Goscelin...

oceanography Giovanni Ceva (1647–1734), mathematician, widely known for proving Ceva's theorem in elementary geometry Giovanni Girolamo Saccheri (1667–1733)...