Geometry & Topology Monographs, Vol. 4 (2002),
Invariants of knots and 3-manifolds (Kyoto 2001),
Paper no. 7, pages 89--101.

Polynomial invariants and Vassiliev invariants

Myeong-Ju Jeong, Chan-Young Park

Abstract. We give a criterion to detect whether the derivatives of the HOMFLY polynomial at a point is a Vassiliev invariant or not. In particular, for a complex number b we show that the derivative P_K^{(m,n)}(b,0)=d^m/da^m d^n/dx^n P_K(a,x)|(a, x) = (b, 0) of the HOMFLY polynomial of a knot K at (b,0) is a Vassiliev invariant if and only if b= -+1. Also we analyze the space V_n of Vassiliev invariants of degree <=n for n = 1,2,3,4,5 by using the bar-operation and the star-operation in [M-J Jeong, C-Y Park, Vassiliev invariants and knot polynomials, to appear in Topology and Its Applications]. These two operations are unified to the hat-operation. For each Vassiliev invariant v of degree <=n, hat(v) is a Vassiliev invariant of degree <=n and the value hat(v)K) of a knot K is a polynomial with multi-variables of degree <=n and we give some questions on polynomial invariants and the Vassiliev invariants.

Keywords. Knots, Vassiliev invariants, double dating tangles, knot polynomials

AMS subject classification. Primary: 57M25.

E-print: arXiv:math.GT/0211045

Submitted to GT on 29 November 2001. (Revised 7 March 2002.) Paper accepted 22 July 2002. Paper published 28 July 2002.

Notes on file formats

Myeong-Ju Jeong, Chan-Young Park
Department of Mathematics, College of Natural Sciences
Kyungpook National University, Taegu 702-701 Korea

GTM home page

EMIS/ELibM Electronic Journals

Outdated Archival Version

These pages are not updated anymore. They reflect the state of 21 Apr 2006. For the current production of this journal, please refer to