Brunella's mixed Nevanlinna-current conjecture

Let XX be a compact projective surface of general type. A Nevanlinna current associated with an entire curve f:CXf:\mathbb{C}\rightarrow X has a Siu decomposition

T=Talg+Tdiff,\mathsf{T}=\mathsf{T}_{\text{alg}}+\mathsf{T}_{\text{diff}},

with singular part Talg\mathsf{T}_{\text{alg}} and diffuse part Tdiff\mathsf{T}_{\text{diff}}.

Brunella's mixed Nevanlinna-current conjecture. Some entire curve shall produce a Nevanlinna current T=Talg+Tdiff\mathsf{T}=\mathsf{T}_{\text{alg}}+\mathsf{T}_{\text{diff}} with both nontrivial singular part Talg0\mathsf{T}_{\text{alg}}\neq 0 and nontrivial diffuse part Tdiff0\mathsf{T}_{\text{diff}}\neq 0.

This is the opposite alternative to Brunella's zero–one conjecture and is explicitly described in the source as still open. The source compares the dichotomy with a zero–one law and suggests that an Oka-principle construction may yield a counterexample to the first conjecture.

Sources & referencesView supporting material

Primary source

Song-Yan Xie, “Entire curves producing distinct Nevanlinna currents”, arXiv:2309.04690 (2023).

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