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math.CO2025
Symmetric decompositions and Euler-Stirling statistics on Stirling permutations
Shi-Mei Ma, Jianfeng Wang, Guiying Yan +2
The Stirling permutations introduced by Gessel-Stanley have recently received considerable attention. Motivated by Ji's work on -Eulerian polynomials (Sci China Math., 2025)…
math.CO2025
Eulerian-type polynomials over Stirling permutations and box sorting algorithm
Shi-Mei Ma, Jun-Ying Liu, Jean Yeh +1
It is well known that ascents, descents and plateaux are equidistributed over the set of classical Stirling permutations. Their common enumerative polynomials are the second-order…