Correlation functions of the Rudin-Shapiro sequence
arXiv:2211.01090 · doi:10.1016/j.indag.2023.03.003
Abstract
In this paper, we show that all odd-point correlation functions of the balanced Rudin--Shapiro sequence vanish and that all even-point correlation functions depend only on a single number, which holds for any weighted correlation function as well. For the four-point correlation functions, we provide a more detailed exposition which reveals some arithmetic structures and symmetries. In particular, we show that one can obtain the autocorrelation coefficients of its topological factor with maximal pure point spectrum among them.
arXiv comment26 pages