dorsal/arxiv
View SchemaThe Wiener Wintner and Return Times Theorem Along the Primes
| Authors | Jan Fornal, Anastasios Fragkos, Ben Krause, Michael Lacey, Hamed Mousavi, Yu-Chen Sun |
|---|---|
| Categories | |
| ArXiv ID | 2601.10459vv1 |
| URL | https://arxiv.org/abs/2601.10459 |
| License | http://creativecommons.org/licenses/by/4.0/ |
Abstract
We prove the following Return Times Theorem along the sequence of prime times, the first extension of the Return Times Theorem to arithmetic sequences: For every probability space, $(\Omega,\nu)$, equipped with a measure-preserving transformation, $T \colon \Omega \to \Omega$, and every $f \in L^\infty(\Omega)$, there exists a set of full probability, $\Omega_f \subset \Omega$ with $\nu(\Omega_f) =1$, so that for all $\omega \in \Omega_f$, for any other probability space $(X,\mu)$, equipped with a measure-preserving transformation $S : X \to X$, for any $g \in L^{\infty}(X)$, \begin{align} \frac{1}{N} \sum_{n \leq N} f(T^{p_n} \omega) g(S^{p_n} \cdot) \end{align} converges $\mu$-almost surely; above, $\{ 2=p_1 < p_2 < \dots \}$ are an enumeration of the primes. The Wiener-Wintner theorem along the primes is an immediate corollary. Our proof lives at the interface of classical Fourier analysis, combinatorial number theory, higher order Fourier analysis, and pointwise ergodic theory, with $U^3$ theory playing an important role; our $U^3$-estimates for \emph{Heath-Brown} models of the von Mangoldt function may be of independent interest.
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"abstract": "We prove the following Return Times Theorem along the sequence of prime times, the first extension of the Return Times Theorem to arithmetic sequences:\n For every probability space, $(\\Omega,\\nu)$, equipped with a measure-preserving transformation, $T \\colon \\Omega \\to \\Omega$, and every $f \\in L^\\infty(\\Omega)$, there exists a set of full probability, $\\Omega_f \\subset \\Omega$ with $\\nu(\\Omega_f) =1$, so that for all $\\omega \\in \\Omega_f$, for any other probability space $(X,\\mu)$, equipped with a measure-preserving transformation $S : X \\to X$, for any $g \\in L^{\\infty}(X)$,\n \\begin{align}\n \\frac{1}{N} \\sum_{n \\leq N} f(T^{p_n} \\omega) g(S^{p_n} \\cdot)\n \\end{align}\n converges $\\mu$-almost surely; above, $\\{ 2=p_1 \u003c p_2 \u003c \\dots \\}$ are an enumeration of the primes. The Wiener-Wintner theorem along the primes\n is an immediate corollary.\n Our proof lives at the interface of classical Fourier analysis, combinatorial number theory, higher order Fourier analysis, and pointwise ergodic theory, with $U^3$ theory playing an important role; our $U^3$-estimates for \\emph{Heath-Brown} models of the von Mangoldt function may be of independent interest.",
"arxiv_id": "2601.10459",
"authors": [
"Jan Fornal",
"Anastasios Fragkos",
"Ben Krause",
"Michael Lacey",
"Hamed Mousavi",
"Yu-Chen Sun"
],
"categories": [
"math.DS",
"math.CA",
"math.NT"
],
"license": "http://creativecommons.org/licenses/by/4.0/",
"title": "The Wiener Wintner and Return Times Theorem Along the Primes",
"url": "https://arxiv.org/abs/2601.10459",
"version": "v1"
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