No particularly good reason - I am also using Stokes systems as tests, but thought it might be interesting to test on a saddle point system arising from a different proble. On Fri, Oct 21, 2016 at 11:50:24AM -0600, Jed Brown wrote: > Why doesn't a Stokes problem fulfill your needs? > > Patrick Sanan <[email protected]> writes: > > > Yes, but AFAIK that example produces a 2x2 system - I was hoping for > > something with a variable problem size, ideally with some sort of > > physics motivating the underlying optimization problem. > > > > On Fri, Oct 21, 2016 at 7:23 PM, Justin Chang <[email protected]> wrote: > >> Something like this? > >> > >> http://www.mcs.anl.gov/petsc/petsc-current/src/tao/constrained/examples/tutorials/toy.c.html > >> > >> > >> On Friday, October 21, 2016, Patrick Sanan <[email protected]> wrote: > >>> > >>> Are there any examples already in PETSc or TAO that assemble such a > >>> system (which could thus be dumped)? SNES example ex73f90t assembles a > >>> non-symmetric KKT system.
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