3 papers
math.CO2026
A Refinement of the Fixed--Pixed Points Equidistribution on restricted Permutations
Yao Dong, Chao Xu
Motivated by a recent conjecture of Bsila, Cox, Hugo, Styron and Zhuang concerning fixed points and pixed points on pattern-avoiding permutations, we prove a bivariate refinement i…
math.CO2025
Web permutations, Seidel triangle and normalized -coefficients
Yao Dong, Zhicong Lin, Qiongqiong Pan
The web permutations were introduced by Hwang, Jang and Oh to interpret the entries of the transition matrix between the Specht and -web bases of the irreducible $§_…
math.CO2024
A -analog of the Stirling-Eulerian Polynomials
Yao Dong, Zhicong Lin, Qiongqiong Pan
In 1974, Carlitz and Scoville introduced the Stirling-Eulerian polynomial as the enumerator of permutations by descents, ascents, left-to-right maxima and right-to-l…