4 citations · 4 across the 1 of their papers we have counts for
2 papers
math.CO2021
Set Partitions and Other Bell Number Enumerated Objects
Fufa Beyene, Jörgen Backelin, Roberto Mantaci +1
In this paper, we study classes of subexcedant functions enumerated by the Bell numbers and present bijections on set partitions. We present a set of permutations whose transpositi…
math.CO2005★ 4 cited
Binomial posets with non-isomorphic intervals
Jörgen Backelin
The confluent binomial posets with the atomic function A(n) = max (1,2^(n-2)) are classified. In particular, it is shown that in general there are non-isomorphic intervals of the s…