Leonardo (leoˈnardo), also called Leonardo of Pisa . ?1170–?1250, Italian mathematician: popularized the decimal system in Europe
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Near his body is a cipher with the digits of the Fibonacci sequence and amalgams referring to Leonardo da Vinci and his Mona Lisa.Dan Brown Decoded
The Daily Beast
September 15, 2009
Italian mathematician who popularized the modern Arabic system of numerals in the western world and discovered the Fibonacci sequence of integers.
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