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 Omar Khayyam Courtesy of Personalities Nobel

استعرض الموضوع السابق استعرض الموضوع التالي اذهب الى الأسفل 
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تاريخ التسجيل : 01/09/2009

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مُساهمةموضوع: Omar Khayyam Courtesy of Personalities Nobel   السبت 15 مايو 2010, 20:47



[ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذه الصورة]





[ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذه الصورة]
Omar Khayyam
Courtesy of Personalities
Nobel



Born Ghiyath

al-Din
Abul Fatah Umar Ibn Ibrahim al-Khayyam in 1044 in Nishapur, a Persian

city,
Omar Khayyam was a well-known mathematician, astronomer, philosopher,
and

poet. He spent most of his life in Persian intellectual centres
such as

Samarkand and Bukhara, and enjoyed the favour of the Seljuk
sultans who ruled

the region.

Khayyam's
best-known
scientific contributions were in algebra and astronomy. His

classification
of algebraic equations was fundamental to the advancement of

algebra
as a science, for example, just as his work on the theory of parallel

lines
was important in geometry. In astronomy, Khayyam's greatest legacy is a

remarkably accurate solar calendar, which he developed when the
Seljuk sultan,

Malik-Shah Jalal al-Din, required a new schedule for
revenue collection.

Khayyam's calendar, called Al-Tarikh-al-Jalali
after the sultan, was even more

accurate than the Gregorian calendar
presently used in most of the world: the

Jalali calendar had an
error of one day in 3770 years, while the Gregorian had

an error of
one day in 3330 years. Khayyam measured the length of one year as

365.24219858156
days, which is remarkably accurate. It has since been discovered

that
the number changes in the 6th decimal place over a person's lifetime.
For

comparison of Khayyam's accuracy, the length of one year at the
end of the 19th

century was 365.242196 days, and today it is
365.242190. Although the calendar

project was cancelled upon
Malik-Shah's death in 1092, the Jalali calendar has

survived and is
still used in parts of Iran and Afghanistan today.





[ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذه الصورة]

A Persian carpet depicting Khayyam's poetry
Courtesy of FarsiNet




Khayyam
is also

a well-known poet. This is the profession by which he is
best-known in the West,

often at the expense of his scientific
achievements. His fame as a poet in the

West has only existed since
1839, however, when Edward Fitzgerald published an

English
translation of Khayyam's Rubaiyat ("Quatrains"). It has since become a

classic
of world literature, and is largely responsible for influencing
European

ideas about Persian poetry and literature. Because he was
known as a scientist

in his own time, and his poetry did not surface
until 200 years after his death,

some doubt whether Khayyam indeed
wrote the Rubaiyat. After careful analysis,

however, most scholars
now agree that he is the author, revealing a

philosophical side to
Khayyam that few of his contemporaries knew.



Khayyam's legacy
remains
largely in science, however, with his work in geometry so far ahead of

its
time that it was not used again until Ren� Descartes built upon
Khayyam's

theories in 17th century France


 الموضوع الأصلي : Omar Khayyam Courtesy of Personalities Nobel 
المصدر :
مُنتَدَيَاتْ صُـوتــْ بَــلَــدْنََــا

______________________________________________________

eNg AhMeD

 

 

Omar Khayyam Courtesy of Personalities Nobel

استعرض الموضوع السابق استعرض الموضوع التالي الرجوع الى أعلى الصفحة 
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