Resumen de Presencia de la matemática discreta en las competiciones deportivas
María Candelaria Espinel Febles 
This paper presents three graphs in sporting events: 1. Graph in tree that specifies how the teams or players can compared to choose a winner. In a knockout tournament games are played until all but one player have been eliminated. 2. Complete graph for scheduling the matches in a round robin tournament. A league is a partition of graph in rounds. 3. Digraph known as a tournament for the ranks of the players
