conjugate gradient method; preconditioning; multigrid method
An algorithm for using the preconditioned conjugate gradient method to solve a coarse level problem is presented.
[lit1] J. Mandel: Adaptive Iterative Solvers in Finite Elements. (to appear).
[lit2] J. Mandel: Balancing Domain Decomposition
. Communications in numerical methods in engineering, vol. 9 (1993). MR 1208381
| Zbl 1071.65558