Kirby–Thompson invariants of distant sums of standard surfaces

Blair–Campisi–Taylor–Tomova [Blair, Campisi, Taylor and Tomova, Kirby-Thompson distance for trisections of knotted surfaces, J. Lond. Math. Soc. (2) 105(2) (2022) 765–793.] defined the [Formula: see text]-invariant [Formula: see text] of a knotted surface [Formula: see text], using pants complexes of trisection surfaces of bridge trisections of [Formula: see text]. After that, Aranda–Pongtanapaisan–Zhang [Aranda, Pongtanapaisan and Zhang, Bounds for Kirby-Thompson invariants of knotted surfaces, Geom. Dedicata 217(6) (2023) 30] introduced the [Formula: see text]-invariant [Formula: see text] using dual curve complexes instead of pants complexes. In this paper, we determine both the [Formula: see text]-invariant and the [Formula: see text]-invariant of any finite distant sum of standard surfaces, and this is the first example of knotted surfaces whose bridge numbers and these invariants can be arbitrarily large.

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Publication Details

Journal
Journal of Knot Theory and Its Ramifications
Published
2026-02-12
DOI
https://doi.org/10.1142/s0218216526500185
Primary Topic
Geometric and Algebraic Topology
Type
article
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article

Kirby–Thompson invariants of distant sums of standard surfaces

Minami Taniguchi
Journal of Knot Theory and Its Ramifications
Geometric and Algebraic Topology
article

Kirby–Thompson invariants of distant sums of standard surfaces

Minami Taniguchi
article en

Abstract

Blair–Campisi–Taylor–Tomova [Blair, Campisi, Taylor and Tomova, Kirby-Thompson distance for trisections of knotted surfaces, J. Lond. Math. Soc. (2) 105(2) (2022) 765–793.] defined the [Formula: see text]-invariant [Formula: see text] of a knotted surface [Formula: see text], using pants complexes of trisection surfaces of bridge trisections of [Formula: see text]. After that, Aranda–Pongtanapaisan–Zhang [Aranda, Pongtanapaisan and Zhang, Bounds for Kirby-Thompson invariants of knotted surfaces, Geom. Dedicata 217(6) (2023) 30] introduced the [Formula: see text]-invariant [Formula: see text] using dual curve complexes instead of pants complexes. In this paper, we determine both the [Formula: see text]-invariant and the [Formula: see text]-invariant of any finite distant sum of standard surfaces, and this is the first example of knotted surfaces whose bridge numbers and these invariants can be arbitrarily large.

Journal of Knot Theory and Its Ramifications
Tokyo Institute of Technology (JP)
Openalex Percentile: Top 53%
Geometric and Algebraic Topology
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