2 citations · 2 across the 4 of their papers we have counts for
4 papers
Wilf Equivalence for Length-Three Patterns and Flat POPs, and a Conjecture of Qiu and Remmel
Shiqi Cao, Sergey Kitaev, Yuxin Wu
It is well known that, for each classical pattern of length 3, the number of -avoiding permutations of length is the th Catalan number, and numerous bijections betwee…
Dowling's polynomial conjecture for independent sets of matroids
Shiqi Cao, Keyi Chen, Yitian Li +1
The celebrated Mason's conjecture states that the sequence of independent set numbers of any matroid is log-concave, and even ultra log-concave. The strong form of Mason's conjectu…
On finite spacer rank for words and subshifts
Su Gao, Liza Jacoby, William Johnson +4
We define a notion of rank for words and subshifts that we call spacer rank, extending the notion of rank-one symbolic shifts of Gao and Hill. We construct infinite words of each f…
No function is continuous only at points in a countable dense subset
Cesar E. Silva, Yuxin Wu
We give a short proof, that can be used in an introductory real analysis course, that if a function that is defined on the set of real numbers is continuous on a countable dense se…