it is well known that if the coefficient matrix in a linear system is large and sparse or sometimes not readily available, then iterative solvers may become the only choice. the block solvers are an attractive class of iterative solvers for solving linear systems with multiple right-hand sides. in general, the block solvers are more suitable for dense systems with preconditioner. in this paper,...

Khoo SB. Test Your Knowledge: A right " spider " hand and a left " eagle " hand. Malaysian Family Physician. 2009;4(2&3):100-2 CASE HISTORY Jim (not his real name) is a 68 year-old friendly and pleasant Eurasian man who has been very pleased to participate in our clinical teaching sessions for many years. To the medical students, Jim is fond of showing his hands and to test them by providing th...