3 citations · 4 across the 3 of their papers we have counts for
5 papers · 1 filter
Generalized Ordered Set Partitions
Beáta Bényi, Miguel Méndez, José L. Ramirez
In this paper, we consider ordered set partitions obtained by imposing conditions on the size of the lists, and such that the first elements are in distinct blocks, respectivel…
Restricted -Stirling Numbers and their Combinatorial Applications
Beáta Bényi, Miguel Méndez, José L. Ramírez +1
We study set partitions with distinguished elements and block sizes found in an arbitrary index set . The enumeration of these -partitions leads to the introduction o…
Some Applications of -restricted Set Partitions
Beáta Bényi, José L. Ramírez
In the paper, the authors present several new relations and applications for the combinatorial sequence that counts the possible partitions of a finite set with the restriction tha…
Combinatorial and Arithmetical Properties of the Restricted and Associated Bell and Factorial Numbers
Victor H. Moll, José L. Ramirez, Diego Villamizar
Set partitions and permutations with restrictions on the size of the blocks and cycles are important combinatorial sequences. Counting these objects lead to the sequences generaliz…
A New Approach to the -Whitney Numbers by Using Combinatorial Differential Calculus
José L. Ramírez, Miguel A. Méndez
In the present article we introduce two new combinatorial interpretations of the -Whitney numbers of the second kind obtained from the combinatorics of the differential operator…