The Compendious Book on Calculation by Completion and Balancing

High Quality Content by WIKIPEDIA articles! Al-Kitāb al-mukhtaṣar fī hīsāb al-ğabr wa'l-muqābala (Arabic for The Compendious Book on Calculation by Completion and Balancing, in Arabic script 'الكتاب المختصر في حساب الجبر والمقابلة'), also known under a shorter name spelled as Hisab al-jabr w'al-muqabala, Kitab al-Jabr wa-l-Muqabala and other transliterations) is a mathematical book written in Arabic in approximately AD 820 by the Persian(more exactly, Central Asian) mathematician Muhammad ibn Mūsā al-Khwārizmī in Baghdad, the capital of the Abbasid Caliphate at the time.