[petsc-users] Use block Jacobi preconditioner with SNES

[Jed Brown]

Ali Reza Khaz'ali <arkhazali at cc.iut.ac.ir> writes:

>> The BAIJ blocks are usually grouping of fields for each discretization
>> "point".  NEST is usually grouping different fields with which you want
>> to use different sparse solution strategies (e.g., algebraic multigrid
>> on some, a simpler solver on others).
>>
> I have to apologize for taking so much of your time. I'd be grateful if 
> you could kindly answer my (hopefully last) question: what do you 
> propose for a non-linear system that has variable number of unknowns in 
> each of its discretization points?

Normal AIJ.