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Khwarizmi, Al-Khwarizmi, Khwarizmi (The names may differ. Persian: خوارزمی) or full name Abu Jafer Muhammad bin Musa al-Khwarizmi (780, Khwarizm - 850, Baghdad); is a Persian scientist who worked in the fields of mathematics, astronomy, geography, and algorithms. Latin translations of his works on Indian numerals introduced the decimal positional number system to the Western world in the twelfth century.


Brahmagupta (Sanskrit: ब्रह्मगुप) (598 – 668 AD) was an Indian mathematician and astronomer. He has two important works on mathematics and astronomy, the theoretical “Brāhmasphuṣasiddhānta (628)” and the more practical “Khaṇḍakhādyaka (665)”. Brahmagupta is the scientist who first gave the rules for trading with zero. Since the proofs are not offered, it is not known where Brahmagupta's mathematics was derived from.

Liu Hui

Liu Hui (Chinese: 劉徽; pinyin: Liú Huī; 225-295 AD) was a Chinese mathematician who lived during the Wei Dynasty. His contributions, especially the narrative he wrote called "Nine Chapters on the Art of Mathematics" include a proof of the Pythagorean Theorem, theorems of solid geometry, an improvement on Archimedes' π approach, and a systematic method for deciphering linear equations in several unknowns.