Crosscap number and knot projections
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DOI: 10.1142/s0129167x18500842
Abstract: We introduce an unknotting-type number of knot projections that gives an upper bound of the crosscap number of knots. We determine the set of knot projections with the unknotting-type number at most two, and this… read more here.
Keywords: knot projections; crosscap number; number; number knot ... See more keywords