1 citations · 1 across the 3 of their papers we have counts for
3 papers
Partitions and Partial Matchings Avoiding Neighbor Patterns
William Y. C. Chen, Neil J. Y. Fan, Alina F. Y. Zhao
We obtain the generating functions for partial matchings avoiding neighbor alignments and for partial matchings avoiding neighbor alignments and left nestings. We show that there i…
Labeled Ballot Paths and the Springer Numbers
William Y. C. Chen, Neil J. Y. Fan, Jeffrey Y. T. Jia
The Springer numbers are defined in connection with the irreducible root systems of type , which also arise as the generalized Euler and class numbers introduced by Shanks. Co…
Han's Bijection via Permutation Codes
William Y. C. Chen, Neil J. Y. Fan, Teresa X. S. Li
We show that Han's bijection when restricted to permutations can be carried out in terms of the cyclic major code and the cyclic inversion code. In other words, it maps a permutati…