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? The entire block is interpolated when it comes to the interpolation phase? If the original problem is not a system of equations, then bs=1? Thank you, Eduardo
