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JFM 55.0799.01
Krawtchouk, M.
(Kravchuk, M.P.)
Sur une généralisation des polynômes d'Hermite.
(French)
[J] C. R. 189, 620-622 (1929). ISSN 0001-4036

Aus der allgemeinen Theorie der orthogonalen Polynome folgen leicht verschiedene Eigenschaften der Polynome $\varphi_n(x)$, definiert durch die Orthogonalitätsbedingung $$ \sum_{i=0}^{l-1} \binom{l-1}{i} p^i q^{l-1-i} \varphi_m(i) \varphi_n(i) = \varepsilon_{mn} \tag 1 $$ $$ (m, n = 0, 1, 2, \dots; \ p > 0, \ q > 0, \ p + q = 1). $$ Es gilt $$ \varphi_n(x) =\binom{l-1}{n}^{-\tfrac 12} (pq)^{-\tfrac n2} \sum_{i=0}^n (-1)^i \binom{l - x -1}{n - i}\binom{x}{i} p^{n-i} q^i, $$ woraus für $l\to\infty$, $p(l - 1) = a =$ const die Polynome $$ \text{const }\frac{x!}{a^x} \varDelta^n \left[ \frac{a^{x-n}}{(x-n)!}\right] \tag 2 $$ und für $l\to\infty$, $x = p(l - 1) + t\sqrt{2pq (l-1)}$ die {\it Hermite}schen Polynome $$ \text{const }e^{t^2} \frac{d^n}{dt^n} (e^{-t^2}) \tag 3 $$ hervorgehen. Es sei bemerkt, dass die Polynome (2) vom Standpunkt der zu (1) analogen Orthogonalität eingehend von {\it Charlier, Jordan} und insbesondere {\it H. Pollaczek-Geiringer} [Z. Angew. Math. 8, 292--309 (1928; JFM 54.0559.02), besonders S. 301 u. folg.] untersucht worden sind. Sie spielen in der Statistik eine erhebliche Rolle. (IV 3 D.)
(Data of JFM: JFM 55.0799.01; Copyright 2005 Jahrbuch Database used with permission)
[Szegö, Prof. G. (Saint Louis)]
MSC 2000:
*33C45 Orthogonal polynomials and functions of hypergeometric type

Citations: JFM 54.0559.02

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Highlights
Scientific prize winners of the ICM 2010
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Lie groups, physics and geometry. An introduction for physicists, engineers and chemists.

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