Griffiths' conjecture on Nevanlinna's second theorem

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Let XX be a complex projective variety, let AA be an ample line bundle on XX, and write

KX:=dim(X)TXK_X:= \wedge^{\dim(X)}T_X^{\ast}

for its canonical line bundle. Let DD be a normal crossing divisor on XX. For a holomorphic curve f:CXf:\mathbb{C}\to X, let mf,D(r)m_{f,D}(r) denote its proximity function and Tf,A(r)T_{f,A}(r) and Tf,KX(r)T_{f,K_X}(r) its characteristic functions; write exc\leq_{\operatorname{exc}} for an inequality holding outside an exceptional set of values of rr.

Griffiths' conjecture. (1) For every holomorphic curve f:CXf:\mathbb{C}\to X with Zariski-dense image,

mf,D(r)+Tf,KX(r)excO(log+Tf,A(r))+o(logr).m_{f,D}(r)+T_{f,K_X}(r)\leq_{\operatorname{exc}}O\bigl(\log^+T_{f,A}(r)\bigr)+o\bigl(\log r\bigr).

(2) For every ϵ>0\epsilon>0, there exists an algebraic subset ZXZ\nsubseteq X such that, for every holomorphic curve f:CXf:\mathbb{C}\to X with f(C)⊄Zf(\mathbb{C})\not\subset Z,

CR,mf,D(r)+Tf,KX(r)excϵTf,A(r)+C.\forall C\in\mathbb{R},\quad m_{f,D}(r)+T_{f,K_X}(r)\leq_{\operatorname{exc}}\epsilon T_{f,A}(r)+C.

This is the conjectural form of Nevanlinna's second theorem for holomorphic curves. The supplied context does not state whether either formulation is known or remains open.

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Sources & referencesView supporting material

Primary source

Antoine Sédillot, “Topological adelic curves: Zariski-Riemann spaces, algebraic coverings, Harder-Narsimhan filtrations and heights”, arXiv:2503.20156 (2026).

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