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A combinatorial problem on a directed graph
(Centro de Investigaciones en Matemática Pura y Aplicada (CIMPA) y Escuela de Matemática, San José, Costa Rica., 2016)
A combinatorial identity and applications
(Unión Matemática Argentina, 2013-05-29)
An identity for the finite sum 1^N rac{z^n}{q^n-r} is given. Related sums (or series) were studied by Scherk, Clausen, Ramanujan, Shanks, Andrews and others. We use such identity to give new formulas for sum_1^infty ...
Bijective proofs using two-line matrix representations for partitions
(SpringerDordrechtHolanda, 2010)
ON SUMS OF BINOMIAL COEFFICIENTS
(Universidad Católica del Norte, Departamento de Matemáticas, 2009)
q-Pell sequences and two identities of V.A. Lebesgue
(Elsevier Science BvAmsterdamHolanda, 2002)
A combinatorial problem on a directed graphUn problema combinatorio basado en un grafo orientado
(Universidad de Costa Rica, Centro de Investigación en Matemática Pura y Aplicada (CIMPA), 2016)
Provas de identidades via argumentos combinatórios
(Universidade Federal do Rio Grande do NorteBrasilUFRNEspecialização em Ensino de Matemática, 2016-08-28)
The Combinatorial analysis is the branch of mathematics that analyzes structures and discrete relationships. From their study it is possible to solve many problems, especially those that lead us to determine cardinality, ...