Finite type invariants based on the band-pass and doubled delta moves
| dc.creator | Conant, James | |
| dc.creator | Mostovoy, Jacob | |
| dc.creator | Stanford, Ted | |
| dc.date | 2005-11-08 | |
| dc.date | 2009-01-14 | |
| dc.date.accessioned | 2026-07-07T12:29:16Z | |
| dc.date.available | 2026-07-07T12:29:16Z | |
| dc.description | We study generalizations of finite-type knot invariants obtained by replacing the crossing change in the Vassiliev skein relation by some other local move, analyzing in detail the band-pass and doubled-delta moves. Using braid-theoretic techniques, we show that, for a large class of local moves, generalized Goussarov's n-equivalence classes of knots form groups under connected sum. (Similar results, but with a different approach, have been obtained before by Taniyama and Yasuhara.) It turns out that primitive band-pass finite-type invariants essentially coincide with standard primitive finite-type invariants, but things are more interesting for the doubled-delta move. The complete degree 0 doubled-delta invariant is the $S$-equivalence class of the knot. In this context, we generalize a result of Murakami and Ohtsuki to show that the only primitive Vassiliev invariants of S-equivalence taking values in an abelian group with no 2-torsion arise from the Alexander-Conway polynomial. We start analyzing degree one doubled-delta invariants by considering which Vassiliev invariants are of doubled-delta degree one, finding that there is exactly one such invariant in each odd Vassiliev degree, and at most one (which is Z/2-valued) in each even Vassiliev degree. Analyzing higher doubled-delta degrees, we observe that the Euler degree n+1. part of Garoufalidis and Kricker's rational lift of the Kontsevich integral is a doubled-delta degree $2n$ invariant. | |
| dc.description | We revised the Theorem stating that all primitive finite-type invariants of S-equivalence come from the Conway Polynomial so that it is restricted to invariants taking values in an Abelian group with no 2-torsion. Otherwise, mostly cosmetic changes. To appear in JKTR | |
| dc.identifier | https://arxiv.org/abs/math/0511189 | |
| dc.identifier | http://arxiv.org/abs/math/0511189 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/215817 | |
| dc.subject | Geometric Topology | |
| dc.subject | Quantum Algebra | |
| dc.subject | 57M27 | |
| dc.title | Finite type invariants based on the band-pass and doubled delta moves | |
| dc.type | text |