Skein theories for virtual tangles [article]

Joshua R. Edge
2020 arXiv   pre-print
In this paper, we use skein-theoretic techniques to classify all virtual knot polynomials and trivalent graph invariants with certain smallness conditions. The first half of the paper classifies all virtual knot polynomials giving non-trivial invariants strictly smaller than the one given by the Higman-Sims spin model. In particular, we exhibit a family of skein theories coming from Rep(O(2)) with an interesting braiding. In addition, all skein theories of oriented virtual tangles with some
more » ... lness conditions are classified. In the second half of the paper, we classify all non-trivial invariants of (perhaps non-planar) trivalent graphs coming from symmetric trivalent categories. For each of these categories, we also classify when the sub-category generated by only the trivalent vertex is braided. An interesting example of this arise from the tensor category Deligne's S_t.
arXiv:2008.04294v1 fatcat:em5yidd3tbhe3htb5sh75jmare