2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/168741Simion had a unimodality conjecture concerning the number of lattice paths in a rectangular grid with the Ferrers diagram of a partition removed. Hildebrand recently showed the stronger result that these numbers are log concave. Here we present a simple proof of Hildebrand's result.4 pagesCombinatorics05A17text