Al Kindi
Abu Yusuf Ya qub ibn Ishaq al-Kindi ( 801 to Kufa - 873 ) ( Arabic : ), better known by his Latinized name of Alchindius or Al-Kindi, is considered one of the greatest Philosophy Al-Kindi uses the philosophy Aristotelian , while the decking of Platonism. In his first philosophy book, he defines metaphysics as "the knowledge of the First Reality, Cause of all reality" Science Al-Kindi was employed by Al-Ma'mun to the House of Wisdom (Bait al-Hikma). With colleagues Al-Khwarizmi and brothers Banu Musa , he was responsible for the translation of Greek manuscripts of scholars. It seems that because of his poor knowledge in Greek, it has only improved the translations made by others, and added his own comments to the Greek works. Al-Kindi wrote many works on arithmetic, including manuscripts on Indian numbers, the harmony of numbers, line geometry, multiplication, measurement of proportions and time algorithms. He also wrote on space and time he thinks both finite . He said the existence of an infinite size leads to a paradox and is therefore not possible. In the area of geometry, he discusses the theory of parallel lines. It gives a lemma on the existence of two lines in the plane, both parallel and not without intersection. The non-Euclidean geometry is not far. Two of his works are devoted to optics, but in the spirit of the time, without clearly separating the theory of light from that vision. In his books on music theory, he highlights as Pythagoras that produce the harmonious sounds each have a specific height. The degree of harmony depends on the frequency of sounds. He also knows that the generation of sound waves produced that stimulate the ear. He published the first book of cryptanalysis , (manuscript on deciphering cryptographic messages) found in 1987 in the Ottoman archives of Istanbul , this book presents the technique of frequency analysis of letters of ciphertext. He wrote 290 books, usually in the form of brief treaties, the main fall in the following areas: Works
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See also
Al-Kindi Averroes Avicenna Ibn Khaldun Omar Khayyam
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