Ahmad ibn Ibrahim ibn Ali ibn Munim al-Abdari, was a mathematician, originally from Dénia in Andalusia, he lived and taught in Marrakesh, a major city of which location, where he was known as one of the best scholars in geometry and number theory
Marrakesh Marrakesh ( or ; Arabic: مراكش‎ ‎ "Murrākuš"; Berber: "Meṛṛakec"), also known by the French spelling Marrakech, is a major city of the Kingdom of Morocco. It is the fourth largest city in the country, after Casablanca, Fez and Tangier. It is the capital city of the mid-southwestern region of Marrakesh-Safi. Located to the north of the foothills of the snow-capped Atlas Mountains, Marrakesh is situated 580 km southwest of Tangier, 327 km southwest of the Moroccan capital of Rabat, 239 km south of Casablanca, and 246 km northeast of Agadir.
Ibn Yunus Abu al-Hasan 'Ali ibn 'Abd al-Rahman ibn Ahmad ibn Yunus al-Sadafi al-Misri (Arabic: ابن يونس) (c. 950-1009) was an important Egyptian Muslim astronomer and mathematician, whose works are noted for being ahead of their time, having been based on meticulous calculations and attention to detail.