2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/107761Let $Φ(x,y)$ be a bivariate polynomial with complex coefficients. The zeroes of $Φ(x,y)$ are given a combinatorial structure by considering them as arcs of a directed graph $G(Φ)$. This paper studies some relationship between the polynomial $Φ(x,y)$ and the structure of $G(Φ)$.13 pages, 6 figures, See also http://www-ma2.upc.edu/~montes/Commutative AlgebraCombinatorics05C75; 14H99; 14H05text