CALCULATING THE FUNDAMENTAL BIQUANDLES OF SURFACE LINKS FROM THEIR CH–DIAGRAMS
2012 ◽
Vol 21
(10)
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pp. 1250102
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The fundamental biquandle is an invariant of an oriented surface link, which is defined by a presentation obtained from a surface diagram of the surface link: The generating set consists of labels of the semi-sheets and the relator set consists of relations defined at the double point curves. Any surface link can be presented by a link diagram with some markers which is called a ch-diagram. Using this fact, we give a method for calculating the fundamental biquandle of a surface link from its ch-diagram directly.
2015 ◽
Vol 24
(04)
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pp. 1550018
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2017 ◽
Vol 231
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pp. 159-185
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1892 ◽
Vol 11
(1)
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pp. 19-26
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2011 ◽
Vol 434
(8)
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pp. 1920-1944
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1991 ◽
Vol 113
(2)
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pp. 290-295
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