Ibrahim ibn Sinan (

Arabic Arabic (, ' ; , ' or ) is a Semitic language spoken primarily across the Arab world.Semitic languages: an international handbook / edited by Stefan Weninger; in collaboration with Geoffrey Khan, Michael P. Streck, Janet C. E.Watson; Walter ...

: ''Ibrāhīm ibn Sinān ibn Thābit ibn Qurra'', ; born 295-296 AH/c. 908 AD in

Baghdad Baghdad (; ar, بَغْدَاد , ) is the capital of Iraq and the second-largest city in the Arab world after Cairo. It is located on the Tigris near the ruins of the ancient city of Babylon and the Sassanid Persian capital of Ctesiphon ...

, died: 334-335 AH/946 AD in Baghdad, aged 38) was a

mathematician A mathematician is someone who uses an extensive knowledge of mathematics in their work, typically to solve mathematical problems. Mathematicians are concerned with numbers, data, quantity, structure, space, models, and change. History On ...

and

astronomer An astronomer is a scientist in the field of astronomy who focuses their studies on a specific question or field outside the scope of Earth. They observe astronomical objects such as stars, planets, moons, comets and galaxies – in either ...

belonging to a family of scholars who originally hailed from

Harran Harran (), historically known as Carrhae ( el, Kάρραι, Kárrhai), is a rural town and district of the Şanlıurfa Province in southeastern Turkey, approximately 40 kilometres (25 miles) southeast of Urfa and 20 kilometers from the border ...

in northern

Mesopotamia Mesopotamia ''Mesopotamíā''; ar, بِلَاد ٱلرَّافِدَيْن or ; syc, ܐܪܡ ܢܗܪ̈ܝܢ, or , ) is a historical region of Western Asia situated within the Tigris–Euphrates river system, in the northern part of the ...

. He was the son of Sinan ibn Thabit (c. 880–943) and the grandson of Thābit ibn Qurra (c. 830–901).. Like his grandfather, he belonged to a religious sect of

star worship Astrotheology, astral mysticism, astral religion, astral or stellar theology (also referred to as astral or star worship) is the worship of the stars (individually or together as the night sky), the planets, and other heavenly bodies as deities, ...

pers known as the

Sabians of Harran The Sabians, sometimes also spelled Sabaeans or Sabeans, are a mysterious religious group mentioned three times in the Quran (as , in later sources ), where it is implied that they belonged to the 'People of the Book' (). Their original ident ...

.. He also studied

geometry Geometry (; ) is, with arithmetic, one of the oldest branches of mathematics. It is concerned with properties of space such as the distance, shape, size, and relative position of figures. A mathematician who works in the field of geometry is c ...

, in particular

tangents In geometry, the tangent line (or simply tangent) to a plane curve at a given point is the straight line that "just touches" the curve at that point. Leibniz defined it as the line through a pair of infinitely close points on the curve. Mo ...

to circles. He made advances in the quadrature of the

parabola In mathematics, a parabola is a plane curve which is mirror-symmetrical and is approximately U-shaped. It fits several superficially different mathematical descriptions, which can all be proved to define exactly the same curves. One descri ...

and the theory of integration, generalizing the work of

Archimedes Archimedes of Syracuse (;; ) was a Greek mathematician, physicist, engineer, astronomer, and inventor from the ancient city of Syracuse in Sicily. Although few details of his life are known, he is regarded as one of the leading scientis ...

, which was unavailable at the time. He is often referenced as one of the most important mathematicians of his time.

See also

Notes

Further reading