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16 papers · 1 filter
On the self-convolution of generalized Fibonacci numbers
Hacène Belbachir, Toufik Djellal, Jean-Gabriel Luque
We focus on a family of equalities pioneered by Zhang and generalized by Zao and Wang and hence by Mansour which involves self convolution of generalized Fibonacci numbers. We show…
Hyperpfaffians
Ammar Aboud, Jean-Gabriel Luque
We define and inverstigate a generalization of the pfaffian for multiple array which interpolate between the hyperdeterminant and the hyperp-faffian.
A combinatorial Hopf algebra for the boson normal ordering problem
Imad Eddine Bousbaa, Ali Chouria, Jean-Gabriel Luque
In the aim to understand the generalization of Stirling numbers occurring in the bosonic normal ordering problem, several combinatorial models have been proposed. In particular, Bl…
Combinatorial Hopf algebras from PROs
Jean-Paul Bultel, Samuele Giraudo
We introduce a general construction that takes as input a so-called stiff PRO and that outputs a Hopf algebra. Stiff PROs are particular PROs that can be described by generators an…
Bell polynomials in combinatorial Hopf algebras
Ammar Aboud, Jean-Paul Bultel, Ali Chouria +2
Partial multivariate Bell polynomials have been defined by E.T. Bell in 1934. These polynomials have numerous applications in Combinatorics, Analysis, Algebra, Probabilities, etc.…
Dirichlet convolution and enumeration of pyramid polycubes
Christophe Carré, Noemie Debroux, Matthieu Deneufchatel +4
We investigate the enumeration of two families of polycubes, namely pyramids and espaliers, in connection with the multi-indexed Dirichlet convolution