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On crossoid structure on knots I. M. Nikonov |
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Аннотация: We define a structure called crossoid for description of colorings of the crossings in knots diagrams. Crossoids generalize parities in knot theory introduced by V.O. Manturov. On the other hand, any biquandle induces a crossoid structure. We give a topological description of the fundamental crossoid of a knot, and define a crossoid cocycle invariant of knots valued in crossoid cohomology. Язык доклада: английский Website: https://us02web.zoom.us/j/81866745751?pwd=bEFqUUlZM1hVV0tvN0xWdXRsV2pnQT09 |
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