Madar Yanja is a complete collection of poems and Diwan of Hakim Abul Fatah Umar Ibn Ibrahim al-Khayami, known as "Khayyam", a philosopher, mathematician, astrologer and poet who was born in Neishabur in 439 AH. He cooperated in arranging the observation of Malekshahi and modifying the Jalali calendar. He has poems in Persian and Tazi and books in both languages. One of his works in mathematics, algebra and confrontation
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