Brahmagupta-Fibonacci Identity/Historical Note
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Historical Note on Brahmagupta-Fibonacci Identity
Both Brahmagupta and Leonardo Fibonacci described what is now known as the Brahmagupta-Fibonacci Identity in their writings:
- 628: Brahmagupta: Brahmasphutasiddhanta (The Opening of the Universe)
- 1225: Fibonacci: Liber quadratorum (The Book of Squares)
However, it appeared earlier than either of those in Diophantus of Alexandria's Arithmetica of the third century C.E.