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Cycle index series of structures over digraphs
ArticleAbstract: Recently, we introduced (Méndez, Adv. Math. 123 (1996) 243-275.) a generalization of Joyal (Adv. MatPalabras claves:Autores:Miguel A. MendezFuentes:scopusWalks on directed graphs and matrix polynomials
ArticleAbstract: We give a matrix generalization of the family of exponential polynomials in one variable φk(x). OurPalabras claves:Umbral calculus; polynomials of binomial type; walks; digraphsAutores:Miguel A. MendezFuentes:scopus