Quotients of sequences under the binomial convolution

This paper gives expressions for the solution $\{a(n)\}$ of the equation \begin{equation*} \sum_{k=0}^n{n \choose k}a(k)b(n-k)=c(n), \ n=0,1,2,\ldots, \end{equation*} where $b(0)\ne 0$, that is, of the equation $a \circ b = c$ in $a$, where $\circ$ is the binomial convolution. These expressions are classified as recursive, explicit, determinant, exponential generating function and convolutional expressions. These expressions are compared with those under the usual Cauchy convolution. Several special cases and examples of combinatorial nature are also discussed.

Authors

Publication Details

Journal
Notes on Number Theory and Discrete Mathematics
Published
2024-11-05
DOI
https://doi.org/10.7546/nntdm.2024.30.4.681-690
Primary Topic
advanced mathematical theories
Type
article
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article

Quotients of sequences under the binomial convolution

Pentti Haukkanen
Notes on Number Theory and Discrete Mathematics
advanced mathematical theories
article

Quotients of sequences under the binomial convolution

Pentti Haukkanen
article en

Abstract

This paper gives expressions for the solution $\{a(n)\}$ of the equation \begin{equation*} \sum_{k=0}^n{n \choose k}a(k)b(n-k)=c(n), \ n=0,1,2,\ldots, \end{equation*} where $b(0)\ne 0$, that is, of the equation $a \circ b = c$ in $a$, where $\circ$ is the binomial convolution. These expressions are classified as recursive, explicit, determinant, exponential generating function and convolutional expressions. These expressions are compared with those under the usual Cauchy convolution. Several special cases and examples of combinatorial nature are also discussed.

Notes on Number Theory and Discrete MathematicsVol. 30(4)
Openalex Percentile: Top 68%
advanced mathematical theories
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Quotients of sequences under the binomial convolution — Pentti Haukkanen · Notes on Number Theory and Discrete Mathematics (2024) | TGRS Research Map | TGRS