Muhyi al-Din al-Maghribi
Encyclopedia
, (c.1220 Spain
– c.1283 Iran
) was a Muslim astronomer and mathematician born in Spain
, worked in Damascus
, Syria
and eventually in the Maragha observatory in Maragha, Ilkhanate
of Persia, where he worked under the guidance of Nasir al-Din Tusi.
Muhyi al-Din is most known for his works in trigonometry
, Book on the theorem of Menelaus, Treatise on the calculation of sine
s.
He is also known for his commentaries on classic Greek mathematical works, in particular, his commentary about Book XV of Elements
about measurements of the regular polyhedra.
Spain
Spain , officially the Kingdom of Spain languages]] under the European Charter for Regional or Minority Languages. In each of these, Spain's official name is as follows:;;;;;;), is a country and member state of the European Union located in southwestern Europe on the Iberian Peninsula...
– c.1283 Iran
Iran
Iran , officially the Islamic Republic of Iran , is a country in Southern and Western Asia. The name "Iran" has been in use natively since the Sassanian era and came into use internationally in 1935, before which the country was known to the Western world as Persia...
) was a Muslim astronomer and mathematician born in Spain
Spain
Spain , officially the Kingdom of Spain languages]] under the European Charter for Regional or Minority Languages. In each of these, Spain's official name is as follows:;;;;;;), is a country and member state of the European Union located in southwestern Europe on the Iberian Peninsula...
, worked in Damascus
Damascus
Damascus , commonly known in Syria as Al Sham , and as the City of Jasmine , is the capital and the second largest city of Syria after Aleppo, both are part of the country's 14 governorates. In addition to being one of the oldest continuously inhabited cities in the world, Damascus is a major...
, Syria
Syria
Syria , officially the Syrian Arab Republic , is a country in Western Asia, bordering Lebanon and the Mediterranean Sea to the West, Turkey to the north, Iraq to the east, Jordan to the south, and Israel to the southwest....
and eventually in the Maragha observatory in Maragha, Ilkhanate
Ilkhanate
The Ilkhanate, also spelled Il-khanate , was a Mongol khanate established in Azerbaijan and Persia in the 13th century, considered a part of the Mongol Empire...
of Persia, where he worked under the guidance of Nasir al-Din Tusi.
Muhyi al-Din is most known for his works in trigonometry
Trigonometry
Trigonometry is a branch of mathematics that studies triangles and the relationships between their sides and the angles between these sides. Trigonometry defines the trigonometric functions, which describe those relationships and have applicability to cyclical phenomena, such as waves...
, Book on the theorem of Menelaus, Treatise on the calculation of sine
Sine
In mathematics, the sine function is a function of an angle. In a right triangle, sine gives the ratio of the length of the side opposite to an angle to the length of the hypotenuse.Sine is usually listed first amongst the trigonometric functions....
s.
He is also known for his commentaries on classic Greek mathematical works, in particular, his commentary about Book XV of Elements
Euclid's Elements
Euclid's Elements is a mathematical and geometric treatise consisting of 13 books written by the Greek mathematician Euclid in Alexandria c. 300 BC. It is a collection of definitions, postulates , propositions , and mathematical proofs of the propositions...
about measurements of the regular polyhedra.