ufl team mailing list archive

[Anders Logg <logg@xxxxxxxxx>]

On Mon, Nov 09, 2009 at 12:58:32PM +0000, Garth N. Wells wrote:
>
>
> Marie Rognes wrote:
> > Kristian Oelgaard wrote:
> >> Quoting Anders Logg <logg@xxxxxxxxx>:
> >>
> >>
> >>> This is something we've discussed before, but I want to discuss it
> >>> again.
> >>>
> >>> Could we change the definition of the gradient of a vector to be the
> >>> "normal" definition:
> >>>
> >>>   grad(u) = du_i / dx_j
> >>>
> >>> ?
> >>>
> >> I think this sounds like an excellent idea.
> >>
> >>
> >
> > Me too.
> >
>
> Cowards!  ;)  You wait for Martin the leave and then jump on the bandwagon.
>
> I suggested this March/April, and Martin's argument against was for
> consistency with other operations. I think that it's fine to change so
> long that other operations do not break or lead to
> unexpected/inconsistent results.

:-)

I've had this discussion with Martin at least twice and both times he
managed to convince me of his definition. But I keep forgetting the
arguments in favor of the current definition (and more so when it
gets me into trouble).

--
Anders

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