This method is recursively used for n-by-n matrices. By this method, any N-by-N matrices like M are
reduced to four n 1-by-n 1 matrices and one n 2-by-n 2 matrix. Then the value of determinant of
A is given with the determinant of a 2 by 2 matrix that is made by representing any Mij of matrix A on the
corresponding locate, dividing by the determinant of M11,nn.