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Fibonacci
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Leonardo Bonacci, also Leonardo da Pisa, commonly known as Fibonacci, was an Italian mathematician from the Republic of Pisa, considered to be "the most talented Western mathematician of the Middle Ag
Statue of Fibonacci (1863) by Giovanni Paganucci [it] in the Camposanto Monumentale, Pisa
Statue of Fibonacci (1863) by Giovanni Paganucci [it] in the Camposanto Monumentale, Pisa
A page of Fibonacci's Liber Abaci from the Biblioteca Nazionale di Firenze showing (in box on right) the Fibonacci sequence with the position in the s
A page of Fibonacci's Liber Abaci from the Biblioteca Nazionale di Firenze showing (in box on right) the Fibonacci sequence with the position in the sequence labeled with Latin numbers and Roman numerals and the value in Hindu-Arabic numerals
Modern engraving of Fibonacci, not based on authentic sources. There are no known authentic descriptions or portraits of Fibonacci.
Modern engraving of Fibonacci, not based on authentic sources. There are no known authentic descriptions or portraits of Fibonacci.
Golden ratio
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In mathematics, two quantities are in the golden ratio if their ratio is the same as the ratio of their sum to the larger of the two quantities. Expressed algebraically, for quantities a and b with a
Fibonacci
…up to the thirteenth place, the value 233, though another manuscript carries it to the next place, the value 377. Fibonacci did not speak about the golden ratio as the limit of the ratio of consecutive numbers in this sequence. In the 19th century, a statue of Fibonacci was set in Pisa. Today it is located in…
Michael Maestlin, the first to write a decimal approximation of the ratio
Michael Maestlin, the first to write a decimal approximation of the ratio
Dan Shechtman demonstrates quasicrystals at the NIST in 1985 using a Zometoy model.
Dan Shechtman demonstrates quasicrystals at the NIST in 1985 using a Zometoy model.
Da Vinci's illustration of a dodecahedron from Pacioli's Divina proportione (1509)
Da Vinci's illustration of a dodecahedron from Pacioli's Divina proportione (1509)
Detail of the saucer plant, Aeonium tabuliforme, showing the multiple spiral arrangement (parastichy)
Detail of the saucer plant, Aeonium tabuliforme, showing the multiple spiral arrangement (parastichy)