Thanks, Barry. I'll look into it.
Original message From: Barry Smith Date:
5/2/23 6:10 PM (GMT-05:00) To: "Takahashi, Tadanaga" Cc:
PETSc Subject: Re: [petsc-users] Help using FAS as an
initial guess You might consider
https://petsc.org/release/manual
You might consider
https://petsc.org/release/manualpages/SNES/SNESSetGridSequence/ it does exactly
what I think you want to do.
FAS is a bit more subtle than that. The "coarse grid problem" that FAS builds
and solves are dependent on the current fine grid solution so you need an
Hi,
I want to know how to configure the FAS so that it solves a problem
on a coarse grid of size 4h, interpolate the solution, and then stop.
Here is the context: I am using Newton LS to solve a problem on square
domain discretized with DMDA meshed with step size h. I have a subroutine
to
