2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/77972Pulling back the weight systems associated with the exceptional Lie algebras and their standard representations by a modification of the universal Vassiliev-Kontsevich invariant yields link invariants; extending them to coloured 3-nets, we derive for each of them a skein relation.18 pages, many figuresQuantum Algebra57M25text