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Al-Khwarizmi's algebra is regarded as the foundation and cornerstone of the sciences. In a sense, al-Khwarizmi is more entitled to be called "the father of algebra" than Diophantus because al-Khwarizmi is the first to teach algebra in an elementary form and for its own sake, Diophantus is primarily concerned with the theory of numbers. [52]
Muḥammad ibn al-ʿAbbās Abū Bakr al-Khwārazmī, better simply known as Abu Bakr al-Khwarazmi was a 10th century Persian poet born in Khwarazm (region in Central Asia conquered by Achaemenids in the 6th century BC), who throughout his long career served in the court of the Hamdanids, Samanids, Saffarids and Buyids. [1]
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Abū Bakr Muḥammad b. al-ʿAbbās al-Khwarizmi (934 – Nishapur, 1002) was a poet and writer in the Arabic language.He gained patronage variously in the courts of Aleppo (with Sayf al-Dawla), Bukhara (with vizier Abu Ali Bal'ami ), Nishapur (praising its emir, Ahmad al-Mikali), Sijistan (under Tahir ibn Muhammad), Gharchistan, and Arrajan (with Sahib ibn Abbad).
Diophantus of Alexandria [1] (born c. AD 200 – c. 214; died c. AD 284 – c. 298) was a Greek mathematician, who was the author of two main works: On Polygonal Numbers, which survives incomplete, and the Arithmetica in thirteen books, most of it extant, made up of arithmetical problems that are solved through algebraic equations. [2]
Al-Majrīṭī took part in the translation of Ptolemy's Planisphaerium, improved existing translations of the Almagest, introduced and improved the astronomical tables of Muhammad ibn Musa al-Khwarizmi, aided historians by working out tables to convert Persian dates to Hijri years, and introduced the techniques of surveying and triangulation.
Al-Khwarizmi was the most widely read mathematician in Europe in the late Middle Ages, primarily through his other book, the Algebra. [8] In late medieval Latin, algorismus , the corruption of his name, simply meant the "decimal number system" that is still the meaning of modern English algorism.
According to al-Tabari's Tarikh, some say Dhu al-Qarnayn the Elder (al-akbar), who lived in the era of Abraham, was the mythical Persian king Fereydun, who al-Tabari rendered as Afrīdhūn ibn Athfiyān. [65] In an account attributed to Umar bin Khattab, Dhu al-Qarnayn is said to be an angel or part angel. [66]