Greene–Wu conjecture on uniform equivalence of the Kobayashi metric

Let (M,h)(M,h) be a simply-connected complete Kähler manifold satisfying

Asectional curvatureB-A \leq \operatorname{sectional\ curvature} \leq -B

for two positive constants AA and BB. Let K\mathfrak{K} denote the Kobayashi metric on MM. Greene–Wu's conjecture. There is a constant C>0C>0, depending only on AA and BB, such that

C1h(z;v)K2(z;v)Ch(z;v),zM, vTz1,0M.C^{-1}h(z;v) \leq \mathfrak{K}^2(z;v) \leq Ch(z;v), \qquad \forall z\in M,\ \forall v\in T_z^{1,0}M.

This conjecture asks for uniform equivalence between the Kobayashi–Royden metric and the Kähler metric under two-sided negative sectional-curvature bounds. The supplied text gives no resolution, so the conjecture is recorded as open.

Sources & referencesView supporting material

Primary source

Jun Nie, “Complete complex Finsler metrics and uniform equivalence of the Kobayashi metric”, arXiv:2309.08456 (2025).

Additional references

2 papers in this index state this conjecture (2017–2023). The statement above is taken from the most recent of them; the others are arXiv:1711.09475.

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