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

A Saccheri quadrilateral is a quadrilateral with two equal sides perpendicular to the base. It is named after Giovanni Gerolamo Saccheri, who used it extensively...

1730 – James Stirling publishes The Differential Method. 1733 – Giovanni Gerolamo Saccheri studies what geometry would be like if Euclid's fifth postulate...

Nasīr al-Dīn al-Tūsī, Witelo, Gersonides, Alfonso, and later Giovanni Gerolamo Saccheri, John Wallis, Johann Heinrich Lambert, and Legendre. Their attempts...

algebraic curve Giovanni Ceva (1647–1734) – Euclidean geometry Johann Jacob Heber (1666–1727) – surveyor and geometer Giovanni Gerolamo Saccheri (1667–1733)...

connecting trigonometric functions and complex numbers, 1733 – Giovanni Gerolamo Saccheri studies what geometry would be like if Euclid's fifth postulate...

refracting lens is invented by English barrister Chester Moore Hall. Giovanni Gerolamo Saccheri studies what geometry would be like if the parallel postulate...

influences on logic and epistemology, and of the non-Euclidean geometry of Gerolamo Saccheri. He was particularly interested in the ways in which what might be...

the second oldest known printed representation of the New World Giovanni Girolamo Saccheri (1667–1733) – Jesuit mathematician and geometer who was perhaps...

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