Remarks ●easy to compute suitable for sparse matrix computation .convergence speed depends on Uk could overflow with finite precision in computer,modified by normalize Uk in every step Copyright©2011，NA⊙Yin Last Modification:Oct.2011 11 Remarks • easy to compute • suitable for sparse matrix computation • convergence speed depends on | λ2 λ1 | • vk could overflow with finite precision in computer, modified by normalize vk in every step Copyright c 2011, NAYin Last Modification: Oct. 2011 11