Open sampotter opened 1 month ago
@pbeckman I wrote your PDF up here to make it easier to iterate on this
We discussed today that the compression test should really be:
Updated. Not sure how to make it so that you can edit my to-do list...
@pbeckman Footnote 1 was actually already fixed. This is was what --rowTreeInitDepth
is for. This option lets you specify an offset (from the root level == 0; e.g., level == 1 in an octree = 8 nodes) into the row/space tree to use when doing the adaptive butterfly. Basically, if I want to not waste my time compressing the first level, assuming it won't work very well (possibly because I know I'm compressing columns from an orthogonal matrix, which is not what's going on with a generalized eigenvalue problem...), then I would pass e.g. --rowTreeInitDepth=1
to start on the first non-root level.
Numerical experiments
1e-2
, then running ARPACK with e.g.1e-15
tolerance probably excessive.Todo
size_t
-converted MFEM sphere discretizations (stiffness and mass matrices in CSR format) to Dropboxbf_lbo
runs on them