Nonrecursive Equivalent of the Conjugate Gradient Method without the Need to Restart

Algorithm 2

Basic IRM-CG algorithm.

Require: , , , ε, {usually }
Ensure: {close to }
(1)	initialisation: steepest descent
(2)
(3)
(4)
(5)	while do {IRM-CG method}
(6)
(7)
(8)
(9)	{second term is zero because }
(10)
(11)
(12)
(13)	end while {end IRM-CG method}