2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/77708A formula that relates triple points, branch points, and their distances from infinity is presented. We recover trivial normal Euler classes for oriented surfaces, and formulas on signed triple points.10 pages, 9 figures (files in eps format). Downloading of postscript file is betterGeometric Topology57Q45text