Counting rises, levels, and drops in compositions.
Heubach, Silvia, Mansour, Toufik (2005)
Integers
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Heubach, Silvia, Mansour, Toufik (2005)
Integers
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Bulletin of the Belgian Mathematical Society - Simon Stevin
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Tauraso, Roberto (2006)
Integers
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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...
Zhang, Zhizheng, Wang, Jun (2005)
Integers
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The Electronic Journal of Combinatorics [electronic only]
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Grime, James (2005)
The Electronic Journal of Combinatorics [electronic only]
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The Electronic Journal of Combinatorics [electronic only]
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Journal of Integer Sequences [electronic only]
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Merlini, Donatella, Uncini, Francesca, Verri, M. Cecilia (2004)
Integers
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