11th-century mathematicians by nationality

The 11th century saw significant contributions to mathematics from various regions and cultures, though it is important to note that the mathematical landscape was quite different from today. Here are some notable mathematicians from the 11th century by nationality: 1. **Arab Mathematicians:** - **Al-Khwarizmi** (though he lived earlier, his works were influential in the 11th century): He is often referred to as the "father of algebra.