High Quality Content by WIKIPEDIA articles! Principles of Hindu Reckoning (Kitab fi usul hisab al-hind) is a mathematics book written by 10th–11th-century Persian mathematician Kushyar ibn Labban. This is the second oldest book extant in Arabic about Hindu arithmetic using Hindu numerals( ),prededed by Kibab al-Fusul fi al-Hisub al-Hindi by Abul al-Hassan Ahmad ibn Ibrahim al-Uglidis written in 952AD. Although Al-Khwarzimi also wrote a book about Hindu arithematics in 825 A.D, but he did not use Hindu numerals, and the Arabic original was lost, only a 12th century translation extant.Kushyar ibn Labban did not mention the Indian sources for Hindu Reckoning, and there is no eariler Indian book extant which covers the same topics as discussed in this book. Principles of Hindu Reckoning becomes one of the foreign sources for Hindu Reckoning in the 10th–11th-century in India.

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