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arXiv 1708.01637math.CA
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矩阵双正交多项式、相伴多项式和第二类函数

Matrix biorthogonal polynomials, associated polynomials and functions of the second kind

Amilcar Branquinho, Juan Carlos García-Ardila, Francisco Marcellán

摘要:

在这项工作中,矩阵双正交多项式之间的相互作用关于一个矩阵的线性泛函,$k$ -th相关的矩阵多项式和第二类矩阵函数,研究的准行列式。给出了一类线性差分方程的两个连续矩阵函数解之比的Poincaré定理。给出了连接这些矩阵函数族的一些新公式。

英文摘要:

In this work the interplay between matrix biorthogonal polynomials with respect to a matrix of linear functionals, the $k$-th associated matrix polynomials and the second kind matrix functions, is studied in terms of quasideterminants. A sort of Poincaré's theorem for the ratio of two consecutive matrix functions solutions of a linear difference equation is also presented. Some new formulas connecting these families of matrix functions are given.

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