Pseudoinverse

A pseudoinverse is like an inverse (opposite) of something, but it's not always an exact opposite. It's like if you have two numbers, a and b. If you divide a by b, that gives you the inverse. However, if b is zero, then it doesn't make sense to divide by zero. This is where the pseudoinverse comes in. The pseudoinverse gives you a close answer to the original answer if dividing by zero is not possible.