Muhammad ibn Musa al-Khwarizmi

Muḥammad ibn Mūsā al-Khwārizmī (Arabic: محمد بن موسى الخوارزمی‎; c. 780 – c. 850) (Arabic pronunciation: [ælxɑːræzmiː]), formerly Latinized as Algoritmi, was a Persianmathematician, astronomer and geographer during the Abbasid Caliphate, a scholar in the House of Wisdom in Baghdad.

In the 12th century, Latin translations of his work on the Indian numerals introduced the decimal positional number system to the Western world. Al-Khwārizmī's The Compendious Book on Calculation by Completion and Balancing presented the first systematic solution of linear and quadratic equations in Arabic. In Renaissance Europe, he was considered the original inventor of algebra, although it is now known that his work is based on older Indian or Greek sources. He revised Ptolemy's Geography and wrote on astronomy and astrology.

Some words reflect the importance of al-Khwārizmī's contributions to mathematics. "Algebra" is derived from al-jabr, one of the two operations he used to solve quadratic equations. Algorism and algorithm stem from Algoritmi, the Latin form of his name. His name is also the origin of (Spanish) guarismo and of (Portuguese) algarismo, both meaning digit.

Al-Khwarizmi (crater)

Al-Khwarizmi is a lunar impact crater located on the far side of the Moon. It lies to the southeast of the crater Moiseev, and northeast of Saenger.

The western inner wall of Al-Khwarizmi is much wider than along the eastern side. The eastern rim overlays a pair of craters, including Al-Khwarizmi J. The outer wall is somewhat distorted from a circular shape, including a double-rim in the south. There is a small central peak at the midpoint, which forms part of a low ridge that bends to the northeast. Several tiny craterlets lie in the northern part of the interior floor. The floor to the southeast is somewhat smoother and free of significant impacts.

The crater was named for the Persian mathematician and astronomer Al-Khwarizmi.

Satellite craters

By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Al-Khwarizmi.

Al-Khwarizmi K crater from Apollo 11

Al-Khwarizmi K crater from Apollo 11

Al-Khwarizmi (disambiguation)

Al-Khwarizmi (lit. "the Khwarezmian") was a 9th-century mathematician.

Al-Khwarizmi refer to the Khwarezm region, and can also refer to:

People

Places

See also