Approximate Schur-Block ILU Preconditioners for Regularized Solution of Discrete Ill-Posed Problems

Table 2

ACV (27) for the proposed family of methods (17) and for the methods from the literature of the orders .

Order , Method
	5	2	3
	5	2	3
	6	1	4
	6	2	4
	7	3	4
	7	2	5
	7	3	4
	8	2	6
	8	3	4
	10	2	5