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$% L. Rudolph, Quasipositivity and new knot invariants, Rev. Mat. Univ, Complut. Madrid 2 (1989), no. 1, 85–109.%$  

Quasipositivity and New Knot Invariants

Lee RUDOLPH
Department of Mathematics and Computer Science
Clark University, Worcester, Massachusetts, 01610 — USA

Received: September 1, 1988
Revised: February 7, 1989
ABSTRACT

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.

1980 Mathematics Subject Classification (1985 revision): 57M25.