 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.