[dune-pdelab] DiscreteGridFunction interface

[Christian Engwer]

Dear all,

I'd like to get a new topic on the never ending
interface-discussion-list.

Why doesn't the DiscreteGridFunction allow the evaluation of
derivatives? 

DiscreteGridFunction is based on the LocalFunctions which allow to
evaluate derivatives and tell till which order. If nobody comes up
with a good reason not to do it, I'd like to include such
functionality in the DiscreteGridFunction. I currently have the
problem, that I'd like to implement different kinds of error
functionals, some of them work require the gradient, some the function
itself and I would prefer not to expose this part to the user.

Christian

-- 
Prof. Dr. Christian Engwer 
Institut für Numerische und Angewandte Mathematik
Fachbereich Mathematik und Informatik der Universität Münster
Einsteinstrasse 62
48149 Münster

E-Mail	christian.engwer at uni-muenster.de
Telefon	+49 251 83-35067
FAX		+49 251 83-32729