Cocycle Invariants and Oriented Singular Knots
نویسندگان
چکیده
We extend the quandle cocycle invariant to oriented singular knots and links using algebraic structures called singquandles assigning weight functions at both regular crossings. This coincides with classical for knots, but provides extra information about links. The new distinguishes granny knot from square knot.
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ژورنال
عنوان ژورنال: Mediterranean Journal of Mathematics
سال: 2021
ISSN: ['1660-5454', '1660-5446']
DOI: https://doi.org/10.1007/s00009-021-01867-6