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Generalizations of a Fibonacci Identity

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Applications of Fibonacci Numbers
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Abstract

A well-known identity is

$$F_{m + n} = L_mF_n + (-1)^{m-1}F_{n-m}$$

where F k and L k are the Fibonacci and Lucas numbers, respectively. With the definitions \(F_{-k} = (-1)^{k + 1}F_k\) and \(L_{-k} = (-1)^kL_k\) formula (1.1) is true for all integer m and n. The identity is easy to prove, and it is evidently useful; Rokach [11], for example, proved that (1.1) is about 2.88 times more efficient than the usual Fibonacci recurrence for computing the Fibonacci numbers.

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References

  1. Bruckman, P.S. “Solution to Problem H-487 (Proposed by S. Rabinowitz).” The Fibonacci Quarterly, Vol. 33 (1995): p. 382.

    Google Scholar 

  2. Comtet, L. Advanced Combinatorics. Dordrecht: Reidel, 1974.

    Book  MATH  Google Scholar 

  3. Filipponi, P. and Horadam, A.F. “Derivative Sequences of Fibonacci and Lucas Polynomials.” Applications of Fibonacci Numbers. Volume 4. Edited by G.E. Bergum, A.F. Horadam and A.N. Philippou. Kluwer Academic Publishers, Dordrecht, The Netherlands, 1991: pp. 99–108.

    Chapter  Google Scholar 

  4. Filipponi, P. and Horadam, A.F. “Integration Sequences of Fibonacci and Lucas Polynomials.” Applications of Fibonacci Numbers. Volume 5. Edited by G.E. Bergum, A.F. Horadam and A.N. Philippou. Kluwer Academic Publishers, Dordrecht, The Netherlands, 1993: pp. 317–330.

    Google Scholar 

  5. Horadam, A.F. “Generating Functions for Powers of a Certain Generalized Sequence of Numbers.” Duke Math. Journal, Vol. 32 (1965): pp. 437–446.

    Article  MathSciNet  MATH  Google Scholar 

  6. Horadam, A.F. “Jacobsthal Representation Polynomials.” The Fibonacci Quarterly, Vol. 35 (1997): pp. 137–148.

    MathSciNet  MATH  Google Scholar 

  7. Horadam, A.F. “Basic Properties of a Certain Generalized Sequence of Numbers.” The Fibonacci Quarterly, Vol. 3 (1965): pp. 161–176.

    MathSciNet  MATH  Google Scholar 

  8. Horadam, A.F. and Mahon, J.M. “Pell and Pell-Lucas Polynomials.” The Fibonacci Quarterly, Vol. 23 (1985): pp. 7–20.

    MathSciNet  MATH  Google Scholar 

  9. Howard, F.T. “Lacunary Recurrences for Sums of Powers of Integers.” The Fibonacci Quarterly, Vol. 36 (1998): pp. 435–442.

    MathSciNet  MATH  Google Scholar 

  10. Rabinowitz, S. “Algorithmic Manipulation of Second Order Linear Recurrences.” The Fibonacci Quarterly (to appear).

    Google Scholar 

  11. Rakoch, A. “Optimal Computations, by Computer, of Fibonacci Numbers.” The Fibonacci Quarterly, Vol. 34 (1996): pp. 436–439.

    MathSciNet  Google Scholar 

  12. Vajda, S. Fibonacci and Lucas Numbers, and the Golden Section. Ellis Horwood Limited, Chichester, 1989.

    MATH  Google Scholar 

  13. Waddill, M.E. and Sacks, L. “Another Generalized Fibonacci Sequence.” The Fibonacci Quarterly, Vol. 5 (1967): pp. 209–227.

    MathSciNet  MATH  Google Scholar 

  14. Wilf, H.S. Generatingfunctionology. Academic Press, Inc., San Diego, 1990.

    MATH  Google Scholar 

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© 1999 Springer Science+Business Media Dordrecht

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Howard, F.T. (1999). Generalizations of a Fibonacci Identity. In: Howard, F.T. (eds) Applications of Fibonacci Numbers. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4271-7_20

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  • DOI: https://doi.org/10.1007/978-94-011-4271-7_20

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-010-5851-3

  • Online ISBN: 978-94-011-4271-7

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