Counting and recounting (Q790816)
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scientific article; zbMATH DE number 3849237
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Counting and recounting |
scientific article; zbMATH DE number 3849237 |
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Counting and recounting (English)
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1983
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An expository article concerning combinatorial identities and their ''natural'' interpretations, written with a light touch and enjoyable to read. Included are identities involving products, summations and inclusion/exclusion. The author concludes by challenging the reader to find the ''natural'' meaning of the identity \(4^ n=\sum^{h}_{r=0}\left( \begin{matrix} 2r\\ r\end{matrix} \right)\left( \begin{matrix} 2n-2r\\ n-r\end{matrix} \right).\)
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product formulae
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interpretations of identities
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