In mathematics, Krawtchouk matrices are matrices whose entries are values of Krawtchouk polynomials at nonnegative integer points.  The Krawtchouk matrix K(N) is an (N+1)×(N+1) matrix. Here are the first few examples:
In general, for positive integer , the entries are given via the generating function
where the row and column indices and run from to .
These Krawtchouk polynomials are orthogonal with respect to symmetric binomial distributions, .
- N. Bose, “Digital Filters: Theory and Applications” [North-Holland Elsevier, N.Y., 1985]
- P. Feinsilver, J. Kocik: Krawtchouk polynomials and Krawtchouk matrices, Recent advances in applied probability, Springer-Verlag, October, 2004
- Hahn Class: Definitions
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