Growth of local height functions along orbits of self-morphisms on projective varieties

preprint2022arXivOpen access

Abstract

In this paper, we consider the limit lim⁡n→∞∑v∈SλY,v(fn(x))/hH(fn(x)) \lim_{n \to \infty} \sum_{v\in S} λ_{Y,v}(f^{n}(x))/h_{H}(f^{n}(x)) where f ⁣:X⟶Xf \colon X \longrightarrow X is a surjective self-morphism on a smooth projective variety XX over a number field, SS is a finite set of places, λY,v λ_{Y,v} is a local height function associated with a proper closed subscheme Y⊂XY \subset X, and hHh_{H} is an ample height function on XX. We give a geometric condition which ensures that the limit is zero, unconditionally when dim⁡Y=0\dim Y=0 and assuming Vojta's conjecture when dim⁡Y≥1\dim Y\geq1. In particular, we prove (one is unconditional, one is assuming Vojta's conjecture) Dynamical Lang-Siegel type theorems, that is, the relative sizes of coordinates of orbits on PN\mathbb{P}^{N} are asymptotically the same with trivial exceptions. These results are higher dimensional generalization of Silverman's classical result.

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