activity
20052020
most citedCombinatorial approach to generalized Bell and Stirling numbers and boson normal ordering problem

32 citations · 39 across the 10 of their papers we have counts for

collaborators

10 papers

math.CO2020

Shift-plethysm, Hydra continued fractions, and m-distinct partitions

Miguel Mendez

We introduce the hydra continued fractions, as a generalization of the Rogers-Ramanujan continued fractions, and give a combinatorial interpretation in terms of shift-plethystic tr…

math.CO2020

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…

math.CO2020

Shift-Plethystic Trees and Rogers-Ramanujan Identitites

Miguel A. Mendez

By studying non-commutative series in an infinite alphabet we introduce shift-plethystic trees and a class of integer compositions as new combinatorial models for the Rogers-Ramanu…

math.CO2018★ 1 cited

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…

math.CO2017★ 3 cited

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…

math.CO2016★ 1 cited

Combinatorial differential operators in: Faà di Bruno formula, enumeration of ballot paths, enriched rooted trees and increasing rooted trees

Miguel A. Mendez

We obtain a differential equation for the enumeration of the path length of general increasing trees. By using differential operators and their combinatorial interpretation we give…