ELI5: Explain Like I'm 5

Factorial moment measure

Okay kiddo, so let's talk about something called a 'factorial moment measure'. Now, do you remember what multiplication is? If you have 3 apples and then someone gives you 2 more apples, you have a total of 6 apples, right? We can write that like 3 x 2 = 6.


Now, let's say we have a big group of apples and we want to know something about them - like how many pairs of apples we can make. A 'factorial moment measure' helps us figure out that answer.


To do that, we first need to count how many apples we have. This number is called the 'first moment'. For example, if we have 6 apples, the first moment is 6.


Next, we use that number to figure out how many pairs of apples (or 'combinations') we can make. This involves using multiplication again but in a slightly different way. When we say "6 choose 2" (written like 6C2), we mean "how many ways can we choose 2 apples from a group of 6 apples?".


So, 6C2 = (6 x 5) / (2 x 1) = 15. That means we can make 15 different pairs of apples.


Finally, we use those pairs to calculate something called 'factorial moment measures'. These measures help us understand how the apples are arranged and how they relate to each other.


Overall, the 'factorial moment measure' is a math tool that helps us count, organize, and understand groups of things - like apples!
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