English

Fibonacci numbers and orthogonal polynomials

Number Theory 2010-08-06 v2 Classical Analysis and ODEs

Abstract

We prove that the sequence (1/Fn+2)n0(1/F_{n+2})_{n\ge 0} of reciprocals of the Fibonacci numbers is a moment sequence of a certain discrete probability, and we identify the orthogonal polynomials as little qq-Jacobi polynomials with q=(15)/(1+5)q=(1-\sqrt{5})/(1+\sqrt{5}). We prove that the corresponding kernel polynomials have integer coefficients, and from this we deduce that the inverse of the corresponding Hankel matrices (1/Fi+j+2)(1/F_{i+j+2}) have integer entries. We prove analogous results for the Hilbert matrices.

Keywords

Cite

@article{arxiv.math/0609283,
  title  = {Fibonacci numbers and orthogonal polynomials},
  author = {Christian Berg},
  journal= {arXiv preprint arXiv:math/0609283},
  year   = {2010}
}

Comments

A note dated June 2007 has been added with some historical comments. Some references have been added and completed