Leonardo Fibonacci of Pisa (c. 1175 c. 1250) daniel-hromada ()

Leonardo Fibonacci of Pisa (c. 1175 c. 1250)

"the most talented Western mathematician of the Middle Ages"
his book Liber Abaci (1202) popularized the Hindu-Arabic numeral systems in Europe
travelled extensively around the Mediterranean coast, meeting with many merchants and learning about their systems of doing arithmetic
first one to describe Fibonacci sequence