17 citations · 52 across the 27 of their papers we have counts for
4 papers · 1 filter
A combinatorial bijection on di-sk trees
Shishuo Fu, Zhicong Lin, Yaling Wang
A di-sk tree is a rooted binary tree whose nodes are labeled by or , and no node has the same label as its right child. The di-sk trees are in natural bijection w…
Refined Wilf-equivalences by Comtet statistics
Shishuo Fu, Zhicong Lin, Yaling Wang
We launch a systematic study of the refined Wilf-equivalences by the statistics and , where and are the number of…
-arrangements, statistics and patterns
Shishuo Fu, Guo-Niu Han, Zhicong Lin
The -arrangements are permutations whose fixed points are -colored. We prove enumerative results related to statistics and patterns on -arrangements, confirming several co…
On -avoiding inversion and ascent sequences
Zhicong Lin, Shishuo Fu
Recently, Yan and the first named author investigated systematically the enumeration of inversion or ascent sequences avoiding vincular patterns of length , where two of the thr…