Cassini's Identity/Historical Note
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Historical Note on Cassini's Identity
Some sources attribute this result to Robert Simson and not to Giovanni Domenico Cassini.
However, it was mentioned as far back as $1608$ in a letter by Johannes Kepler.
Sources
- 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $5$
- 1997: Donald E. Knuth: The Art of Computer Programming: Volume 1: Fundamental Algorithms (3rd ed.) ... (previous) ... (next): $\S 1.2.8$: Fibonacci Numbers
- 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $5$