On Thu, 16 Aug 2007, Ben Tay wrote:
> Hi, > > I found that there's a multigrid option in the manual which can be used > by adding -pctype mg -pcmgtype PC_MG_MULTIPLICATIVE. Should be '-pc_type mg -pc_mg_type MULTIPLICATIVE' Use '-ksp_view' or '-snes_view' to check which PC and parameters are being used. Hong > > However, it seems that I am actually just using LU since with or without > this option, I got exactly the same answer. Am I using multigrid the > wrong way? > > Thanks > >
