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Mar 19, 2018 at 22:07 comment added Iosif Pinelis @Sergio : If in your question $n$ stands for any integer, then in my answer $m$ also denotes any integer. If in your question $n$ stands for any nonnegative integer (say), then in my answer $m$ also denotes any nonnegative integer.
Mar 19, 2018 at 18:09 comment added Sergio Hi Iosif. Thank you so much for your answer. One question: What is the 'm' in the Covariance and Correlation functions meaning? Thanks again.
Mar 18, 2018 at 17:19 history answered Iosif Pinelis CC BY-SA 3.0