[petsc-users] Recursive fieldsplit PCs

2013-12-02 Thread Lawrence Mitchell
Dear petsc-users, I have a 3x3 block system built as a single MatNest (with 9 Mats in it). I'd like to treat this as a 2x2 system: [ A B C D ] where A is 2x2 and precondition the A block with a schur complement. Since I have a mat nest, the ISes for the three fields are just

Re: [petsc-users] Recursive fieldsplit PCs

2013-12-02 Thread Matthew Knepley
On Mon, Dec 2, 2013 at 2:26 AM, Lawrence Mitchell lawrence.mitch...@imperial.ac.uk wrote: Dear petsc-users, I have a 3x3 block system built as a single MatNest (with 9 Mats in it). I'd like to treat this as a 2x2 system: [ A B C D ] where A is 2x2 and precondition the A block with a

Re: [petsc-users] Recursive fieldsplit PCs

2013-12-02 Thread Lawrence Mitchell
On 2 Dec 2013, at 12:23, Matthew Knepley knep...@gmail.com wrote: On Mon, Dec 2, 2013 at 2:26 AM, Lawrence Mitchell lawrence.mitch...@imperial.ac.uk wrote: Dear petsc-users, I have a 3x3 block system built as a single MatNest (with 9 Mats in it). I'd like to treat this as a 2x2 system:

Re: [petsc-users] Recursive fieldsplit PCs

2013-12-02 Thread Matthew Knepley
On Mon, Dec 2, 2013 at 6:31 AM, Lawrence Mitchell lawrence.mitch...@imperial.ac.uk wrote: On 2 Dec 2013, at 12:23, Matthew Knepley knep...@gmail.com wrote: On Mon, Dec 2, 2013 at 2:26 AM, Lawrence Mitchell lawrence.mitch...@imperial.ac.uk wrote: Dear petsc-users, I have a 3x3 block

Re: [petsc-users] Recursive fieldsplit PCs

2013-12-02 Thread Lawrence Mitchell
On 2 Dec 2013, at 15:20, Matthew Knepley knep...@gmail.com wrote: On Mon, Dec 2, 2013 at 6:31 AM, Lawrence Mitchell lawrence.mitch...@imperial.ac.uk wrote: On 2 Dec 2013, at 12:23, Matthew Knepley knep...@gmail.com wrote: On Mon, Dec 2, 2013 at 2:26 AM, Lawrence Mitchell

Re: [petsc-users] Recursive fieldsplit PCs

2013-12-02 Thread Matthew Knepley
On Mon, Dec 2, 2013 at 9:47 AM, Lawrence Mitchell lawrence.mitch...@imperial.ac.uk wrote: On 2 Dec 2013, at 15:20, Matthew Knepley knep...@gmail.com wrote: On Mon, Dec 2, 2013 at 6:31 AM, Lawrence Mitchell lawrence.mitch...@imperial.ac.uk wrote: On 2 Dec 2013, at 12:23, Matthew