Nonvanishing conjecture for the middle homology of torus-knot diagrams

About 21 years old · traced to

Let Dp,pD_{p,p} and Dp,p+1D_{p,p+1} be the torus-knot diagrams used in the paper, and let Hi,j(D)H^{i,j}(D) denote their Khovanov homology in homological degree ii and quantum degree jj. Nonvanishing conjecture. The rank of

H2p−2,p(Dp,p)H^{2p-2,p}(D_{p,p})

and, equivalently, the rank of

H2p−2,p(Dp,p+1),H^{2p-2,p}(D_{p,p+1}),

is nonzero. The statement is presented as a conjecture in the source, and the supplied context proves the equivalence of the two groups but does not resolve their nonvanishing.

References

Primary source

Marko Stosic, “Homological thickness and stability of torus knots”, arXiv:math/0511532 (2006).

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