On a Family of 2-Variable Orthogonal Krawtchouk Polynomials

Details On a Family of 2-Variable Orthogonal Krawtchouk Polynomials On a Family of 2-Variable Orthogonal Krawtchouk Polynomials

2010-07-25

arxiv.org/abs/1007.4327v3

SIGMA 6 (2010), 090, 12 pages

Mathematics

Classical Analysis and ODEs

Scientific paper

10.3842/SIGMA.2010.090

We give a hypergeometric proof involving a family of 2-variable Krawtchouk polynomials that were obtained earlier by Hoare and Rahman [SIGMA 4 (2008), 089, 18 pages] as a limit of the 9-j symbols of quantum angular momentum theory, and shown to be eigenfunctions of the transition probability kernel corresponding to a "poker dice" type probability model. The proof in this paper derives and makes use of the necessary and sufficient conditions of orthogonality in establishing orthogonality as well as indicating their geometrical significance. We also derive a 5-term recurrence relation satisfied by these polynomials.

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