Demailly's Hodge conjecture for strongly positive currents

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Let XX be a complex variety, and let T\mathscr{T} be a (p,p)(p,p)-dimensional strongly positive closed current on XX whose cohomology class satisfies

{T}∈R⊗Z(H2q(X,Z)/tors⁡∩Hq,q(X)).\{\mathscr{T}\} \in \mathbb{R} \otimes_{\mathbb{Z}} \big(H^{2q}(X,\mathbb{Z})/\operatorname{tors} \cap H^{q,q}(X)\big).

Demailly's Hodge conjecture for strongly positive currents. The current T\mathscr{T} is a weak limit

T=lim⁡i→∞Ti,Ti=∑jλij[Zij],\mathscr{T}=\lim_{i \to \infty} \mathscr{T}_i, \qquad \mathscr{T}_i=\sum_j \lambda_{ij}[Z_{ij}],

where each λij\lambda_{ij} is a positive real number and each ZijZ_{ij} is a pp-dimensional subvariety of XX. This conjecture was introduced by Demailly as a Hodge-type conjecture for positive currents, but the paper states that it is now disproven and presents counterexamples in every dimension and codimension greater than 11.

References

Primary source

Karim Adiprasito and Farhad Babaee, “Convexity of complements of tropical varieties, and approximations of currents”, arXiv:1711.02045 (2018).

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