4 citations · 4 across the 2 of their papers we have counts for
2 papers
math.CO2010★ 4 cited
Congruences on the Bell polynomials and the derangement polynomials
Yidong Sun, Xiaojuan Wu, Jujuan Zhuang
In this note, by the umbra calculus method, the Sun and Zagier's congruences involving the Bell numbers and the derangement numbers are generalized to the polynomial cases. Some sp…
math.CO2010
The largest singletons of set partitions
Yidong Sun, Xiaojuan Wu
Recently, Deutsch and Elizalde studied the largest and the smallest fixed points of permutations. Motivated by their work, we consider the analogous problems in set partitions. Let…