= 13th-century mathematicians by nationality
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The 13th century was a period rich in mathematical development, and several notable mathematicians emerged from various regions. Here’s a breakdown of some prominent mathematicians from that era by nationality: 1. **Italy**: - **Fibonacci (Leonardo of Pisa)**: Known for introducing the Hindu-Arabic numeral system to Europe and for the Fibonacci sequence in his work "Liber Abaci" (1202), which had a lasting impact on mathematics.
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