Sorry know one answered it. I had hoped Mark Adams would since he knows much more about it then me.
> On Jul 6, 2016, at 2:50 PM, Eduardo Jourdan <[email protected]> > wrote: > > Hi, > > I am kind of new to algebraic multigrid methods. I tried to figure it on my > own but I'm not be sure about it. > > How the block size (bs) of a blocked matrix affects the AMG AGG? I mean, if > bs = 4, then > in the coarsening phase and setup, blocks of 4x4 matrix elements are > considered to remain in the coarse level and a certain quantity of block > neighbors are restricted and remain in the finer level? Never a row inside a > block matrix is selected and the other elements of this block aren't, am I > right? Correct > The entire block is interpolated when it comes to the interpolation phase? Correct and they all use the same interpolation. > > If the original problem is not a system of equations, then bs=1? Yes. For a Poission operator it is 1 for linear elasticity it is 2 to 6 depending on the dimension and the model. > > Thank you, > > Eduardo > >
