Cassini's Identity/Historical Note

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): $5$
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