2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/144996In this note, we use the recent work of Honda-Kazez-Matic [HKM] to prove that a closed contact 3-manifold admitting a compatible open book decomposition with a nontrivial monodromy which can be presented as a product of left handed Dehn twists is overtwisted.4 pages, 1 figureGeometric Topologytext