Johnson–Lindenstrauss lemma

Johnson-Lindenstrauss Lemma is a mathematical way of shrinking the size of data points without losing the important information about them. Imagine that you have a large collection of pictures. To save room, you can shrink them but still be able to tell which picture is which. That’s what Johnson-Lindenstrauss Lemma does. It takes a large set of data points (like pictures) and turns them into a smaller set, but still able to tell which data point is which. This helps computers process data faster and more efficiently.