The pointed Brody principle for the Kobayashi–Royden pseudometric

From papers

Let XX be a compact complex manifold and let xXx\in X. The infinitesimal Kobayashi–Royden pseudometric is the pseudometric on tangent vectors defined by holomorphic disks in XX; it is degenerate on TxXT_xX when it vanishes on a nonzero tangent vector.

Pointed Brody conjecture. If the infinitesimal Kobayashi–Royden pseudometric is degenerate on TxXT_xX, then there exists a non-constant holomorphic map

\nf:CX\nf:\mathbb C\to X

\nwith f(0)=xf(0)=x.

This asks whether degeneracy at a prescribed point forces an entire curve passing through that point, strengthening the existence conclusion supplied by Brody's theorem, which does not ensure that the resulting curve meets the prescribed point. The source provides no resolution, so the conjecture remains open.

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Sources & referencesView supporting material

Primary source

Joerg Winkelmann, “An Example related to Brody's theorem”, arXiv:math/0405219 (2004).

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