2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/162640We apply contact homology to obtain new results in the problem of distinguishing immersed plane curves without dangerous self-tangencies.10 pages, v2: corrected misstatement about loops of plane curvesGeometric TopologySymplectic Geometry57R42; 53D12, 53D40text