Reduced Khovanov torsion conjecture for T-rich knots

Let KK be a knot. It is T-rich if it satisfies the knight-move condition, has no torsion of odd order, and has at least one torsion rank exceeding the value prescribed by the corresponding knight-move pair. The reduced Khovanov homology is the reduced version of Khovanov homology.

Reduced-torsion conjecture. The knot KK is T-rich if and only if its reduced Khovanov homology has torsion.

The source reports very few knots with torsion in reduced homology and says that all known examples are T-rich, so the conjecture is motivated by computations but remains unresolved in the supplied text.

Sources & referencesView supporting material

Primary source

Alexander N. Shumakovitch, “Torsion of the Khovanov homology”, arXiv:math/0405474 (2018).

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