Abstract
A multiple conjugation quandle is an algebraic structure whose axioms are motivated from handlebody-knot theory. By using an MCQ Alexander pair f, which is a pair of maps corresponding to a linear extension of a multiple conjugation quandle, we can construct the f-twisted Alexander matrices, which produce invariants for handlebody-knots. The purpose of this paper is to show the sufficiency of the definition of MCQ Alexander pairs in constructing the f-twisted Alexander matrices from the aspect of linear extensions of multiple conjugation quandles. Furthermore, we introduce the notion of cohomologous for MCQ Alexander pairs, which induces the same invariant for handlebody-knots.
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22 August 2022
The original article is revised to update the corrections in the reference citations.
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Acknowledgements
The author would like to thank Atsushi Ishii for his helpful comments. This work was supported by JSPS KAKENHI Grant Numbers JP20K22312 and JP21K13796.
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Murao, T. On sufficiency of the definition of MCQ Alexander pairs in terms of invariants for handlebody-knots. Beitr Algebra Geom 64, 689–719 (2023). https://doi.org/10.1007/s13366-022-00652-0
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DOI: https://doi.org/10.1007/s13366-022-00652-0
Keywords
- Multiple conjugation quandle
- Handlebody-knot
- f-twisted Alexander matrix
- MCQ Alexander pair
- Cohomologous