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[Kristian B. Ølgaard <question153352@xxxxxxxxxxxxxxxxxxxxx>]

Question #153352 on DOLFIN changed:
https://answers.launchpad.net/dolfin/+question/153352

    Status: Open => Answered

Kristian B. Ølgaard proposed the following answer:
On 18 April 2011 22:46, Chaffra <question153352@xxxxxxxxxxxxxxxxxxxxx> wrote:
> Question #153352 on DOLFIN changed:
> https://answers.launchpad.net/dolfin/+question/153352
>
>    Status: Answered => Open
>
> Chaffra is still having a problem:
> What would be a scalar, df?

Yes, grad(f) == f.dx(0) as far as I know.

>You should be able to define a vector field
> on a 1D mesh?

Yes, that should be possible.

>It works when you specify dim=2 or 3 but  not when dim=1
> or dim=None

dim=1 and dim=None will probably be the same since dim will be set
equal to the geometric dimension of the cell, 1D in this case.
I could very well be bug in ffc, I would just expect the MixedElement
from UFL to reduce to a FiniteElement if it contained only one
element.

Kristian

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