Permutation reconstruction from minors.
Raykova, Mariana (2006)
The Electronic Journal of Combinatorics [electronic only]
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Displaying similar documents to “A combinatorial proof of the log-concavity of a famous sequence counting permutations.”
Permutation reconstruction from minors.
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Bóna, Miklós (2003)
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Cycle lengths in a permutation are typically Poisson.
Granville, Andrew (2006)
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On the measurement of the (non)linearity of Costas permutations.
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Manstavicius, Eugenijus (2010)
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Preservation of log-concavity on summation
Oliver Johnson, Christina Goldschmidt (2006)
ESAIM: Probability and Statistics
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We extend Hoggar's theorem that the sum of two independent discrete-valued log-concave random variables is itself log-concave. We introduce conditions under which the result still holds for dependent variables. We argue that these conditions are natural by giving some applications. Firstly, we use our main theorem to give simple proofs of the log-concavity of the Stirling numbers of the second kind and of the Eulerian numbers. Secondly, we prove results concerning the log-concavity of...
Permutations avoiding an increasing number of length-increasing forbidden subsequences.
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