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math.AT2020
Multi-switches and virtual knot invariants
Valeriy Bardakov, Timur Nasybullov
In the paper we introduce a general approach how for a given virtual biquandle multi-switch on an algebraic system (from some category) and a given virtual link con…
math.AT2017
Virtual quandle for links in lens spaces
A. Cattabriga, T. Nasybullov
We construct a virtual quandle for links in lens spaces , with . This invariant has two valuable advantages over an ordinary fundamental quandle for links in lens spac…