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t-stack sortable permutations and log-concavity

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No logo availableBanff International Research Station (BIRS) for Mathematical Innovation and Discovery
 Bona, Miklos

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t-stack sortable permutations and log-concavity
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Unimodality, Log-concavity, and Stack sorting
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23
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CC Attribution - NonCommercial - NoDerivatives 4.0 International:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
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Abstract
We will survey a series of intriguing conjectures about log-concavity and t-stack sortable permutations, as well as some recent enumeration results. Connections to lattice paths and labeled plan trees will also be discussed.
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