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Ghiyath al-Din Abu'l-Fath Umar ibn Ibrahim Al-Nisaburi al-Khayyami, or Omar Khayyam, was born a healthy baby on May 18, 1048 in Nishapur, Persia
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Omar Khayyam was invited to the capitol, along with many others. They were invited to work peacfully at an observatory during the Seljuq adn was supported by Abu Tahir.
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Now Omar Khayyam is 25, he has already written many books on things such as music and algebra. He was most famous for "Problems of Arithmetic" a book on mathematics and algebra
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While Malik-Shah had invited him to the observatory, this is around the time when Omar Khayyam greatly helped to change the calender, the Jalali calender. This is very accurate, with him saying the year was 365.24219858156 days. He was very accurate, with today it is 365.242190 days.
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Omar was most famous for writing the Rubáiyát, short poems that consisted of 4 lines. The Rubáiyát has well over 1,000 poems.
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Omar died on December 4th, 1131. He died in his home town of Nishapur, Persia at the age of 83
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