Muhammad ibn Muhammad ibn al-Hasan al-Tūsī (Persian: محمد ابن محمد ابن حسن طوسی 18 February 1201 – 26 June 1274), better known as Nasir al-Din al-Tusi (Persian: نصیر الدین طوسی; or simply Tusi / ˈ t uː s i / in the West), was a Persian polymath, architect, philosopher, physician, scientist, and theologian. Nasir al-Din al-Tusi was a well published author ...

Il V postulato di Euclide è il postulato più conosciuto fra quelli che il matematico Euclide enuncia nei suoi Elementi.I matematici si sono cimentati per più di duemila anni nel tentativo di dedurlo dai primi quattro postulati, finché nell'Ottocento hanno effettivamente dimostrato la sua indeducibilità. Modificando questo postulato si creano geometrie diverse, dette non euclidee

The kamikaze (Japanese: 神風, lit. 'divine wind') were two winds or storms that are said to have saved Japan from two Mongol fleets under Kublai Khan.These fleets attacked Japan in 1274 and again in 1281. Due to the growth of Zen Buddhism among Samurai at the time, these were the first events where the typhoons were described as "divine wind" as much by their timing as by …