Multilinear PCA

Multilinear PCA is a sort of math that helps us understand the relationships between different parts of a big group. It shows us how the parts relate to each other and how they move together. To understand multilinear PCA, it might help to think of it like a jigsaw puzzle. When you do a jigsaw puzzle, you try to put together all the pieces to make a picture. Multilinear PCA is like that, but instead of a picture, you're trying to put together numbers. The pieces of the puzzle are all the individual parts of the big group and how they're connected to each other, and the finished puzzle tells us how the parts relate to one another and move together.