2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/128161We give counterexamples to Okounkov's log-concavity conjecture for Littlewood-Richardson coefficients.Minor changes/corrections. Final version, to appear in Compositio MathematicaRepresentation TheoryAlgebraic GeometryCombinatorics16G20;05E15text