Inversion formula with hypergeometric polynomials and its application to an integral equation
For any complex parameters $x$ and $\nu$, we provide a new class of linear inversion formulas $T = A(x,\nu) \cdot S \Leftrightarrow S = B(x,\nu) \cdot T$ between sequences $S = (S_n)_{n \in \mathbb{N}^*}$ and $T = (T_n)_{n \in \mathbb{N}^*}$, where the infinite lower-triangular matrix $A(x,\nu)$ and...
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Zusammenfassung: | For any complex parameters $x$ and $\nu$, we provide a new class of linear
inversion formulas $T = A(x,\nu) \cdot S \Leftrightarrow S = B(x,\nu) \cdot T$
between sequences $S = (S_n)_{n \in \mathbb{N}^*}$ and $T = (T_n)_{n \in
\mathbb{N}^*}$, where the infinite lower-triangular matrix $A(x,\nu)$ and its
inverse $B(x,\nu)$ involve Hypergeometric polynomials $F(\cdot)$, namely $$
\left\{
\begin{array}{ll}
A_{n,k}(x,\nu) = \displaystyle (-1)^k\binom{n}{k}F(k-n,-n\nu;-n;x),
\\
B_{n,k}(x,\nu) = \displaystyle (-1)^k\binom{n}{k}F(k-n,k\nu;k;x)
\end{array} \right. $$ for $1 \leqslant k \leqslant n$. Functional relations
between the ordinary (resp. exponential) generating functions of the related
sequences $S$ and $T$ are also given.
These new inversion formulas have been initially motivated by the resolution
of an integral equation recently appeared in the field of Queuing Theory; we
apply them to the full resolution of this integral equation. Finally, matrices
involving generalized Laguerre polynomials polynomials are discussed as
specific cases of our general inversion scheme. |
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DOI: | 10.48550/arxiv.1904.08283 |