A Higher Order Iterative Method for Computing the Drazin Inverse

Table 2

Comparison of the computational complexity for different methods.

Methods	(1)	(7)	(8)	(9)	(10)	(13)
Rate of convergence	2	3	3	4	9	9
Number of matrix multiplications	2	3	4	4	9	7
IIEI	2/2=1	3/3=1	3/4=0.75	4/4=1	9/9=1	9/7≈1.285