The composite-knot factor crossing-number conjecture

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Let KK be a composite knot with factors P1,…,PrP_1,\ldots,P_r, and let cr⁡(X)\operatorname{cr}(X) denote the crossing number of a knot XX. Composite-knot factor crossing-number conjecture. The crossing number of a composite knot is bigger than that of each of its factors; in the weaker stated variant, it is not less:

cr⁡(K)≥cr⁡(Pi)(1≤i≤r).\operatorname{cr}(K)\geq \operatorname{cr}(P_i)\qquad(1\leq i\leq r).

The claim is presented as the intersection of the crossing-number additivity and satellite-knot crossing-number conjectures. It is not resolved in the paper.

References

Primary source

Andrei Malyutin, “On the question of genericity of hyperbolic knots”, arXiv:1612.03368 (2016).

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