Explanation
Omer-Khayam was born in Iran in 1048 AD. Omer-Khayam was a poet , Mathematician & Astronomer . Omer-Khayam introduced the modern Solar Hijri calendar , the Jalali calendar. Place of burial : Tomb of Omar Khayyam, Iran Main interests: Mathematics (medieval Islamic); astronomy; Persian philosophy; Persian poetry ND11-07-2023
