Can the Multigrid method be applied to solve a linear system of equations in the form $Ax=b$, that is not necessarily related to differential equations?
Can I use multigrid to solve linear algebra problems that do not arise from a differential equation?
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There are "Algebraic Multigrid Methods" that can be applied to general systems $Ax=b$.
answered Dec 9, 2016 at 15:02
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$\begingroup$ If $A$ is symmetric positive definite (SPD), is it possible to use the AMG method as a preconditioner for the conjugate gradient method? $\endgroup$ Dec 9, 2016 at 15:51
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2$\begingroup$ Yes, you could try AMG as a preconditioner. $\endgroup$ Dec 9, 2016 at 15:57