Mathematical Analysis
A mapping connected with the Schur–Szegő composition
Comptes Rendus. Mathématique, Volume 347 (2009) no. 23-24, pp. 1355-1360.

Every monic polynomial in one variable of the form (x+1)S, degS=n1, is presentable in a unique way as a Schur–Szegő composition of n1 polynomials of the form (x+1)n1(x+ai). We prove geometric properties of the affine mapping associating to the coefficients of S the (n1)-tuple of values of the elementary symmetric functions of the numbers ai.

Tout polynôme unitaire à une variable de la forme (x+1)S, degS=n1, est présentable de façon unique comme composition de Schur–Szegő de n1 polynômes (x+1)n1(x+ai). Nous prouvons des propriétés géométriques de l'application affine associant aux coefficients de S le (n1)-uplet des valeurs des fonctions symétriques élémentaires des nombres ai.

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DOI: 10.1016/j.crma.2009.10.025
Kostov, Vladimir Petrov 1

1 Université de Nice, Laboratoire de Mathématiques, UMR 6621, parc Valrose, 06108 Nice cedex 2, France
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Kostov, Vladimir Petrov. A mapping connected with the Schur–Szegő composition. Comptes Rendus. Mathématique, Volume 347 (2009) no. 23-24, pp. 1355-1360. doi : 10.1016/j.crma.2009.10.025. http://www.numdam.org/articles/10.1016/j.crma.2009.10.025/

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