[petsc-dev] general aggregates in ASM, from GAMG aggregates, and overlap problem

[Mark Adams]

Garth is getting a segv when he uses -pc_gamg_asm_use_agg and an overlap of
1.

This seems like a pretty hard thing to do right and I would not be
surprised if it was not done with complete generality. MatGetSubMatrix is
find to get any submatrix but enlarging a remote subdomain seems very
tricky.

Should I perhaps check for overlap in GAMG and give an error? Maybe it
would be better to have ASM do this.  Maybe I could make ASM have a flag
am-i-nested and not allow overlap if not?

Mark
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-dev/attachments/20160916/a1f8667f/attachment.html>