Equidistribution formulation of the dynamical Mordell–Lang conjecture

Let XX be a variety over an algebraically closed field k\mathbf{k}, let Xf(k)X_f(\mathbf{k}) denote the points whose orbits under a dominant rational self-map f:XXf:X\dashrightarrow X are well defined, and let η\eta be the generic point of XX. For xXf(k)x\in X_f(\mathbf{k}), write Of(x)O_f(x) for its orbit and let δy\delta_y denote the Dirac measure at yy in the constructible topology.

Dynamical Mordell–Lang equidistribution conjecture. If xXf(k)x\in X_f(\mathbf{k}) and Of(x)O_f(x) is Zariski dense in XX, then

limnδfn(x)=δη.\lim_{n\to\infty}\delta_{f^n(x)}=\delta_{\eta}.

This is presented as an equidistribution interpretation of the dynamical Mordell–Lang conjecture, using the characterization of generic sequences in the constructible topology. The supplied text does not state whether this formulation is known or open.

Sources & referencesView supporting material

Primary source

Junyi Xie, “Remarks on algebraic dynamics in positive characteristic”, arXiv:2107.03559 (2021).

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