Delta Move Invariance of the L -Polynomials for Virtual Knots

We investigate when two virtual knots can be related by Δ-moves. We show that the L-polynomials are finite type invariants of order one. As a consequence, they are invariant under Δ-moves for any oriented virtual knot. As an application, we study virtual knots that can be converted into the trivial knot or the virtual knot 2.1 by a sequence of Δ-moves.

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Publication Details

Journal
Journal of Knot Theory and Its Ramifications
Published
2026-11-06
DOI
https://doi.org/10.1142/s0218216526500732
Primary Topic
Geometric and Algebraic Topology
Type
article
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article

Delta Move Invariance of the L -Polynomials for Virtual Knots

Ryuji Higa
3 links
Journal of Knot Theory and Its Ramifications
Geometric and Algebraic Topology
article

Delta Move Invariance of the L -Polynomials for Virtual Knots

Ryuji Higa
article en

Abstract

We investigate when two virtual knots can be related by Δ-moves. We show that the L-polynomials are finite type invariants of order one. As a consequence, they are invariant under Δ-moves for any oriented virtual knot. As an application, we study virtual knots that can be converted into the trivial knot or the virtual knot 2.1 by a sequence of Δ-moves.

Journal of Knot Theory and Its Ramifications
Openalex Percentile: Top 23%
Geometric and Algebraic Topology
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Delta Move Invariance of the L -Polynomials for Virtual Knots — Ryuji Higa · Journal of Knot Theory and Its Ramifications (2026) | TGRS Research Map | TGRS