Work

Étude on the Delta-unknotting number

Year: 2026

Type: preprint

Abstract: We derive an almost sharp lower bound on the Casson invariant of positive braid knots. As a consequence, we show that the $Δ$-unknotting number is quasi-additive on the set of positive and negative braids on a fixed number of strands.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2607.20212

Authors: Baader, Sebastian, Lewark, Lukas

Topic: Geometric and Algebraic Topology

Subfield: Geometry and Topology

Field: Mathematics

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W7170139372

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