2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/112893It is known that the duals of transversal matroids are precisely the strict gammoids. The purpose of this short note is to show how the Lindstrom-Gessel-Viennot lemma gives a simple proof of this result.5 pages, 2 figuresCombinatorics05B35; 05C38; 05A99text