[petsc-dev] PetscSection

[Jed Brown]

On Sat, Nov 10, 2012 at 3:02 PM, Matthew Knepley <knepley at gmail.com> wrote:

>
> > How does one get an IS containing _only_ the labeled points?
>
> DMComplexGetStratumIS()
>

Great. Under what circumstances do you call this routine and get back an IS
with mixed dimension?


>
> >>
> >> > Can you answer how you can distinguish a quad from a tet in a
> >> > non-interpolated mesh?
> >>
> >> You can't, but that is the point. You are not supposed to distinguish
> >> them.
> >
> >
> > Hmm, so these are the same at the category-theory level, but definitely
> not
> > at the mesh topology level. It doesn't seem right to not distinguish
> them at
> > all. How do you write DMComplexInterpolate for mixed-dim strata?
>
> Interpolation is analysis. You need to know what dimension you are in, etc.
>

But it's still topological rather than geometric. You don't need
coordinates, for example.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-dev/attachments/20121110/7377d4d8/attachment.html>