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Abu Abdullah Muhammad bin Musa al-Khwarizmi (stands for the person from Khwarizm) was a Persian scientist, mathematician, astronomer, and astrologer. He was born in 780 A.D. and died around 840 A.D. He is often cited as "the father of algebra", which was named after a part of the title of his book, Hisab al-jabr w'al-muqabala, along with the algorism number system. Although he wrote his works in Arabic, there are various guesses at his native language.



Soviet postage stamp commemorating

his 1200th anniversary



He made major contributions to the fields of algebra, trigonometry, and geography. He corrected Ptolemy’s geographical maps as regards to Africa and the Middle East and published the book Kitab surat al-ard (“The image of the earth”). With his publication about the calculation with Hindu Numerals he promotes the use of the Indian system of numeration in the Middle-East followed by Europe. This book was translated into Latin in the 12th century with the name “Algoritmi de numero Indorum”, because his name was rendered in Latin as “Algoritmi” he is indirect responsible for the term algorithm.


His books made a significant contribution to the advancement of mathematics (solving linear and quadratic equations including geometric principles for completing the square) in Europe. He made contributions in tables of trigonometric functions, refinements in the geometric representation of conic sections, and aspects of the calculus of two errors as well as publications on mechanical devices like the clock, astrolabe, and sundial.





Reference for the contents above and further information of Brahmagupta’s live:




Ziegenbalg J.: Algorithmen, von Hammurapi bis Gödel; Spektrum Akademischer Verlag Heidelberg, Berlin 1996