Correlation Function: A mathematical function that quantifies the degree of statistical dependence between microscopic variables at different positions or times in a physical system.

We introduce the matrix multivariate auto-distance covariance and correlation functions for time series, discuss their interpretation and develop consistent estimators for practical implementation.

Two-time correlation functions of the ce-based MG measured by HP-XPCS at different pressures during compression. At each pressure, the width of the reddish diagonal contour is proportional to the ...