[petsc-dev] Jed will not be happy

[Jed Brown]

On Sun, Aug 14, 2011 at 03:23, David Ketcheson <david.ketcheson at kaust.edu.sa
> wrote:

> For plotting purposes, linear interpolation is fine.  There are other
> things we could do with higher order interpolation, but they're not critical
> yet.


I'm less concerned with the order of the basis functions than with the
possible presence of a nonlinear reconstruction. For any order polynomials,
interpolation is still a linear operator (could be written as a matrix).

If instead the interpolation involved a TVD or WENO reconstruction, or if it
involved coarse level basis functions that were upwinded using a local
characteristic decomposition, then it could not be written as a matrix and
there would be extra semantics associated with transferring solution values
versus increments or residuals.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-dev/attachments/20110814/ce78cfbc/attachment.html>