English

A Euclidean Skolem-Mahler-Lech-Chabauty method

Algebraic Geometry 2010-10-05 v1 Dynamical Systems Logic Number Theory

Abstract

Using the theory of o-minimality we show that the pp-adic method of Skolem-Mahler-Lech-Chabauty may be adapted to prove instances of the dynamical Mordell-Lang conjecture for some real analytic dynamical systems. For example, we show that if f1,...,fnf_1,...,f_n is a finite sequence of real analytic functions fi:(1,1)(1,1)f_i:(-1,1) \to (-1,1) for which fi(0)=0f_i(0) = 0 and fi(0)1|f_i'(0)| \leq 1 (possibly zero), a=(a1,...,an)a = (a_1,...,a_n) is an nn-tuple of real numbers close enough to the origin and H(x1,...,xn)H(x_1,...,x_n) is a real analytic function of nn variables, then the set {mN:H(f1m(a1),...,fnm(an))=0}\{m \in {\mathbb N} : H (f_1^{\circ m} (a_1),...,f_n^{\circ m}(a_n)) = 0 \} is either all of N{\mathbb N}, all of the odd numbers, all of the even numbers, or is finite.

Keywords

Cite

@article{arxiv.1010.0482,
  title  = {A Euclidean Skolem-Mahler-Lech-Chabauty method},
  author = {Thomas Scanlon},
  journal= {arXiv preprint arXiv:1010.0482},
  year   = {2010}
}
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