FTP, name this Persian polymath poet whose most famous line from his Rubaiyat may be, A jug of wine, a loaf of bread, and thou.
His collaboration with other astronomers led to the creation of the Jalali Calendar, more accurate than the Gregorian and computed from the vernal equinox.  In mathematics, he developed a method to solve cubic equations by intersecting a conic section with a circle, as explained in his 1070 Treatise on Demonstration of Problems of Algebra, and his criticism of The Elements (*) may have contributed to the development of non-Euclidean geometry.  However, he was most notable for composing over a thousand quatrains, many of which were translated by Edward Fitzgerald in 5 editions.  FTP, name this Persian polymath poet whose most famous line from his Rubaiyat may be, A jug of wine, a loaf of bread, and thou. 
His collaboration with other astronomers led to the creation of the Jalali Calendar, more accurate than the Gregorian and computed from the vernal equinox.  
Omar {Khayyam}