Displaying similar documents to “A note on alternating sums.”

Counting defective parking functions.

Cameron, Peter J., Johannsen, Daniel, Prellberg, Thomas, Schweitzer, Pascal (2008)

The Electronic Journal of Combinatorics [electronic only]

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Integer powers of arcsin.

Borwein, Jonathan M., Chamberland, Marc (2007)

International Journal of Mathematics and Mathematical Sciences

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The visibility parameter for words and permutations

Ligia Cristea, Helmut Prodinger (2013)

Open Mathematics

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We investigate the visibility parameter, i.e., the number of visible pairs, first for words over a finite alphabet, then for permutations of the finite set {1, 2, …, n}, and finally for words over an infinite alphabet whose letters occur with geometric probabilities. The results obtained for permutations correct the formula for the expectation obtained in a recent paper by Gutin et al. [Gutin G., Mansour T., Severini S., A characterization of horizontal visibility graphs and combinatorics...