On the polynomials homogeneous ergodic bilinear averages with Liouville and M\"obius weights

Abstract

We establish a generalization of Bourgain double recurrence theorem by proving that for any map $T$ acting on a probability space $(X,\mathcal{A},\mu)$, and for any non-constant polynomials $P, Q$ mapping natural numbers to themselves, for any $f,g \in L^2(X)$, and for almost all $x \in X$, we have $$\lim_{\bar{N} \longrightarrow +\infty} \frac{1}{N} \sum_{n=1}^{N}\boldsymbol{\nu}(n) f(T^{P(n)}x)g(T^{Q(n)}x)=0$$ where $\boldsymbol{\nu}$ is the Liouville function or the M\"{o}bius{\P} function.