2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/74352We give a case-free proof that the lattice of noncrossing partitions associated to any finite real reflection group is EL-shellable. Shellability of these lattices was open for the groups of type $D_n$ and those of exceptional type and rank at least three.10 pagesCombinatoricsGroup Theory20F55text