Sphere theorem
The Book of Squares, (Liber Quadratorum)[1] in the original Latin is a book on algebra by Leonardo Fibonacci, published in 1225. Fibonacci's identity, establishing that the set of all sums of two squares is closed under multiplication, appears in it. The book anticipated the works of later mathematicians like Fermat and Euler.[2] The book examines several topics in number theory,[3] among them an inductive method for finding Pythagorean triples based on the sequence of odd integers, and on the fact that the sum of the first members of this sequence is .
Notes
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External links
- ↑ Fibonacci, Leonardo Pisano . The Book of Squares (Liber Quadratorum). An annotated translation into modern English by L. E. Sigler. (1987) Orlando, FL: Academic Press. ISBN 978-0-12-643130-8
- ↑ Berlinghoff, William P. and Quadros Gouvêa (2004). Math through the ages: a gentle history for teachers and others. MAA, p. 34. ISBN 0-88385-736-7
- ↑ McClenon, R. B., "Leonardo of Pisa and his Liber Quadratorum", American Mathematical Monthly, Vol. 26, No. 1, January 1919, pp. 1–8.