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math.CO2014
On the Real-rootedness of the Descent Polynomials of -Stack Sortable Permutations
Philip B. Zhang
Bóna conjectured that the descent polynomials on -stack sortable permutations have only real zeros. Brändén proved this conjecture by establishing a more general result. In…
math.CO2014★ 7 cited
Mutual Interlacing and Eulerian-like Polynomials for Weyl Groups
Arthur L. B. Yang, Philip B. Zhang
We use the method of mutual interlacing to prove two conjectures on the real-rootedness of Eulerian-like polynomials: Brenti's conjecture on -Eulerian polynomials for Weyl group…