2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/73241We show that some of the main results in Laurentiu Maxim's paper on this subject can be obtained (even in a slightly more general setting) using the theory of perverse sheaves of finite rank over $\Q$ as described for instance in the author's recent book.Algebraic GeometryAlgebraic TopologyPrimary 32S20, 32S55, 32S60; Secondary: 14J70, 14F17, 14F45text