2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/75947We prove a conjecture of F. Chapoton relating certain enumerative invariants of (a) the cluster complex associated by S. Fomin and A. Zelevinsky to a finite root system and (b) the lattice of noncrossing partitions associated to the corresponding finite real reflection group.8 pagesCombinatoricsGroup Theory20F55; 05E99text