2 papers
math.CO2025
Pattern avoidance in revised ascent sequences
Robin D. P. Zhou
Inspired by the definition of modified ascent sequences, we introduce a new class of integer sequences called revised ascent sequences. These sequences are defined as Cayley permut…
math.CO2025
Difference ascent sequences and related combinatorial structures
Yongchun Zang, Robin D. P. Zhou
Ascent sequences were introduced by Bousquet-Mélou, Claesson, Dukes and Kitaev, and are in bijection with unlabeled -free posets, Fishburn matrices, permutations avoiding a…