Generalized Lelong-number vanishing conjecture in nef codimension

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Let XX be a compact Kähler manifold of dimension nn, and let k∈Nk\in\mathbb{N} satisfy 1≤k≤n−11\leq k\leq n-1. Let α∈H1,1(X,R)\alpha\in H^{1,1}(X,\mathbb{R}) be a big class. Say that α\alpha is nef in codimension kk if ν(α,Z)=0\nu(\alpha,Z)=0 for every irreducible analytic subset Z⊂XZ\subset X of codimension at most kk. Generalized Lelong-number vanishing conjecture. If α\alpha is nef in codimension kk, then

ν(⟨αn−k⟩,x)=0\nu(\langle \alpha^{n-k}\rangle,x)=0

for every x∈Xx\in X. This generalizes the preceding conjecture by imposing nefness in codimension kk and considering the corresponding non-pluripolar power. The source proposes it as an open extension; the case k=1k=1 recovers the preceding conjecture.

References

Primary source

Duc-Bao Nguyen, Shuang Su and Duc-Viet Vu, “Singularity of non-pluripolar cohomology classes”, arXiv:2508.14669 (2026).

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