Equality characterizations for the slice Cromwell inequality of homogeneous links

From papers

Let LL be a homogeneous link. The slice Cromwell equality conjectures. (i) The slice Cromwell inequality

mindegvPL(v,z)1χ4(L)\min \deg_v P_L(v,z) \leq 1-\chi_4(L)

is an equality if and only if LL is positive. (ii) For a homogeneous diagram DD of LL, the inequality

mindegvPL(v,z)s(D)+w(D)+2s+(D)+12#spL\min \deg_v P_L(v,z) \leq -s(D)+w(D)+2s_+(D)+1-2\#_{sp} L

is an equality if and only if DD is a positive diagram. The slice Cromwell inequality extends Cromwell's inequality from homogeneous links to the smooth four-ball Euler characteristic, while these conjectures seek to characterize positivity through equality in the link-level and diagram-level bounds. The provided source does not indicate whether either conjecture has been resolved.

Progress summary

Nothing recorded yet. Refresh searches the literature and the public web for attempts on this problem, and writes the first summary here.

Sources & referencesView supporting material

Primary source

Tetsuya Ito, “A slice Cromwell inequality of homogeneous links”, arXiv:2504.13491 (2025).

Solutions 0

No solutions have been posted yet.