Anti-diagonal matrix

Okay kiddo, imagine you have a big square with numbers inside it. An anti-diagonal matrix is a special type of square where the numbers start at the top right corner and go diagonally downward until they reach the bottom left corner.

Think of it like this: when you draw a diagonal line from the top right to the bottom left, all the numbers above that line are zeros, and all the numbers below that line are what makes up the anti-diagonal matrix.

So basically, an anti-diagonal matrix is a square where the numbers on a diagonal go the opposite way compared to normal diagonal matrices. It’s just a fancy way of organizing numbers in a square!