1 citations · 1 across the 18 of their papers we have counts for
18 papers
Richardson tableaux and Motzkin paths
Sen-Peng Eu, Tung-Shan Fu, Yi-Hao Kao +1
Richardson tableaux were introduced by Karp and Precup in their study of irreducible components of Springer fibers that are Richardson varieties. Guo gave an explicit bijection bet…
Meanders and Dyck-Path Billiards
Sen-Peng Eu, Tung-Shan Fu, Hsiang-Chun Hsu
We study a statistic on the ordered pairs of Dyck paths of size , which counts the number of billiard trajectories in the grid polygon enclosed by an…
On Ternary Trees and Fighting Fish
Sen-Peng Eu, Tung-Shan Fu, Yu-Ren Pan
Fighting fish is a combinatorial configuration introduced by Duchi, Guerrini, Rinaldi and Schaeffer as a new model of branching surfaces that generalizes directed convex polyominoe…
Bijective Enumeration and Sign-Imbalance for Permutation Depth and Excedances
Sen-Peng Eu, Tung-Shan Fu, Yuan-Hsun Lo
We present a simplified variant of Biane's bijection between permutations and 3-colored Motzkin paths with weight that keeps track of the inversion number, excedance number and a s…
On -Counting of Noncrossing Chains and Parking Functions
Yen-Jen Cheng, Sen-Peng Eu, Tung-Shan Fu +1
For a finite Coxeter group , Josuat-Vergès derived a -polynomial counting the maximal chains in the lattice of noncrossing partitions of by weighting some of the covering…
On Signed Multiplicities of Schur Expansions Surrounding Petrie Symmetric Functions
Yen-Jen Cheng, Meng-Chien Chou, Sen-Peng Eu +2
For , the homogeneous symmetric functions of degree defined by are…