Moore–Penrose pseudoinverse

A Moore–Penrose pseudoinverse is a way of finding an "inverse" for a mathematical matrix. An inverse of a matrix is a special type of calculation that can be used to undo or "reverse" the effect of multiplying one matrix with another. This way, if you multiply the matrix and its inverse, you get the same result as if you multiplied by 1. The Moore–Penrose pseudoinverse can be used when a normal inverse cannot be found. By using this tool, you can still find a way to undo matrix multiplication without having to know the exact inverse.