Marilena Barnabei ; Flavio Bonetti ; Matteo Silimbani - The Eulerian distribution on centrosymmetric involutions

dmtcs:469 - Discrete Mathematics & Theoretical Computer Science, January 1, 2009, Vol. 11 no. 1 - https://doi.org/10.46298/dmtcs.469
The Eulerian distribution on centrosymmetric involutions

Authors: Marilena Barnabei ; Flavio Bonetti ; Matteo Silimbani

We present an extensive study of the Eulerian distribution on the set of centrosymmetric involutions, namely, involutions in S(n) satisfying the property sigma(i) + sigma(n + 1 - i) = n + 1 for every i = 1 ... n. We find some combinatorial properties for the generating polynomial of such distribution, together with an explicit formula for its coefficients. Afterwards, we carry out an analogous study for the subset of centrosymmetric involutions without fixed points.


Volume: Vol. 11 no. 1
Section: Combinatorics
Published on: January 1, 2009
Imported on: March 26, 2015
Keywords: [INFO.INFO-DM] Computer Science [cs]/Discrete Mathematics [cs.DM]


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