11th-century mathematicians

The 11th century was a period during which significant advancements in mathematics occurred, particularly in the Islamic world, as well as in Europe. Here are some noteworthy mathematicians and their contributions during this time: 1. **Al-Khwarizmi (c. 780–850)**: Although he lived earlier than the 11th century, his works were influential well into the 11th century. Al-Khwarizmi is often referred to as the "father of algebra.

Abu al-Fadl ibn Hasdai (also known as Abu al-Fadl al-Hasdai) was a prominent Jewish figure in medieval Spain, specifically during the time of the Caliphate of Córdoba in the 10th century. He is most notably recognized as a physician and a scholar.

Al-Zarqali, also known as Azarquiel, was a prominent 11th-century astronomer, mathematician, and instrument maker from Al-Andalus, which is present-day Spain. He is best known for his contributions to astronomy, particularly for his work on the astrolabe and for creating astronomical tables that were highly regarded in both the Islamic world and Europe.

Franco of Liège refers to a historical and cultural festival held in Liège, Belgium. This event celebrates the rich cultural heritage of the Walloon region, which includes music, gastronomy, and various forms of art. The festival also highlights the importance of the Franco-German culture in the region and often features performances by local and international artists.

Garlandus Compotista, often referred to simply as Compotista, is a historical figure believed to have been a 13th-century scholar or cleric. He is notably associated with the early development of mathematical texts related to astronomy and the calculation of time, particularly calendar systems and the management of timekeeping.

Hermann of Reichenau (1013–1054) was a German Benedictine monk, composer, and scholar, known for his contributions to various fields, including music, astronomy, and hagiography. He was a member of the Reichenau Abbey located on an island in Lake Constance, which was a significant center of learning during the Middle Ages.

Ibn Mu'adh al-Jayyani, also known as Abu Al-Qasim al-Jayyani, was an important figure in Islamic history, particularly noted for his contributions to the fields of astronomy and mathematics during the medieval period. His exact dates of birth and death are not well-documented, but he is often associated with the Islamic Golden Age, a time when science, literature, and culture flourished in the Muslim world.

Muhammad al-Baghdadi, often referred to as Abu Bakr al-Baghdadi, was the leader of the Islamic State of Iraq and Syria (ISIS) from 2010 until his death in 2019. He played a key role in the transformation of the group from an insurgency in Iraq to a terrorist organization that gained significant territory in Iraq and Syria, declaring a caliphate in 2014.

Said al-Andalusi, also known as Abū al-Qāsim Saʿīd ibn Ḥusayn al-Andalusi, was a notable figure in medieval Islamic scholarship, particularly in the context of Al-Andalus (the Muslim-ruled territories in what is now Spain and Portugal). He was born around the year 1029 and passed away around 1070. Al-Andalusi was renowned as a philosopher, astronomer, and mathematician.

Yusuf al-Mu'taman ibn Hud was a prominent historical figure who served as a king of the Taifa of Zaragoza in the early 11th century. He belonged to the Hudid dynasty, which ruled over parts of present-day northeastern Spain during the period of the taifa kingdoms, a time when the Iberian Peninsula was fragmented into various small Muslim-ruled kingdoms following the collapse of the Umayyad Caliphate of Cordoba.