The \((t,q)\)-analogs of secant and tangent numbers (Q540137)
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scientific article; zbMATH DE number 5903055
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | The \((t,q)\)-analogs of secant and tangent numbers |
scientific article; zbMATH DE number 5903055 |
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The \((t,q)\)-analogs of secant and tangent numbers (English)
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1 June 2011
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Summary: The secant and tangent numbers are given \((t, q)\)-analogs with an explicit combinatorial interpretation. This extends, both analytically and combinatorially, the classical evaluations of the Eulerian and Roselle polynomials at \(t = - 1\).
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\(q\)-secant numbers
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\(q\)-tangent numbers
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\((t, q)\)-secant numbers
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\((t, q)\)-tangent numbers
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alternating permutations
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pix
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inverse major index
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lec-statistic
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inversion number
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excedance number
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