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Journal of Combinatorial Theory Series A
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Journal of Combinatorial Theory Series A
Article . 1999
License: Elsevier Non-Commercial
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Log-Concavity and the Exponential Formula

Log-concavity and the exponential formula
Authors: Ernesto Schirmacher;

Log-Concavity and the Exponential Formula

Abstract

\textit{E. A. Bender} and \textit{E. R. Canfield} [J. Comb. Theory, Ser. A 74, No. 1, 57-70, Art. No. 0037 (1996; Zbl 0853.05013)] showed that passing a log-concave sequence through the exponential formula results in a log-concave sequence that is almost log-convex. The author generalizes this result to \(q\)-log-concavity, using in his proof also the theory of symmetric functions, and giving applications to \(q\)-binomial coefficients, and coloured and marked permutations.

Keywords

exponential formula, log-concave sequence, Computational Theory and Mathematics, \(q\)-calculus and related topics, Exact enumeration problems, generating functions, \(q\)-log-concavity, Discrete Mathematics and Combinatorics, symmetric functions, Theoretical Computer Science

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
2
Average
Average
Average
hybrid