Partial inverse of a matrix

A matrix is a group of numbers arranged in rows and columns. A partial inverse of a matrix is when you only find part of the numbers that make up the original matrix after switching around some of the numbers in the matrix. To do this, you have to divide each number in the original matrix by the same number that you used to switch the numbers before. Then, you can put the new numbers back in the same positions as the original numbers, and you will have a partial inverse of the matrix.