12th-century mathematicians by nationality

In the 12th century, the field of mathematics was influenced by various cultures, particularly through the translations and adaptations of earlier works from ancient Greece, India, and the Islamic Golden Age. Mathematicians of this period are often categorized by their nationality or cultural background. Here are some notable mathematicians from that time: ### Islamic Mathematicians: 1. **Ibn al-Haytham (Alhazen)** (c. 965 – c.