Quasihomogene isolierte Singularitäten von Hyperflächen.
Quasihomogene Singularitäten algebraischer Kurven.
Quasipositivity and new knot invariants.
This is a survey (including new results) of relations ?some emergent, others established? among three notions which the 1980s saw introduced into knot theory: quasipositivity of a link, the enhanced Milnor number of a fibered link, and the new link polynomials. The Seifert form fails to determine these invariants; perhaps there exists an ?enhanced Seifert form? which does.