integrating problem

You try to integrate a vector expression, you must figure out what's
wrong with this equation:
La = D*v*(sigma)*dx

Martin

On 19 August 2011 10:25, eagle <email address hidden> wrote:
> New question #168506 on DOLFIN:
> https://answers.launchpad.net/dolfin/+question/168506
>
> i wrote defenitions , variational problem and error shown . what does this error mean and how can be solved .
>
>
> (sigma, u) = TrialFunctions(W)
> (sigmas, us) = TrialFunctions(W)
> (tau, v) = TestFunctions(W)
> e = Function (BDM)
>
>
> # Forward problem
> a = C*(dot(sigma, tau) + div(tau)*u + div(sigma)*v)*dx
> L = 0.0
> e = sigma
>
> # Adjoint problem
> aa = C*(dot(sigmas, tau) + div(tau)*us + div(sigmas)*v)*dx
> La = D*v*(sigma)*dx
>
>
> Trying to integrate expression of rank 1 with free indices ().
> Traceback (most recent call last):
>  File "3.py", line 64, in <module>
>    La = D*v*(sigma)*dx
>  File "/home/Mohseni/Work/FEniCS/lib/python2.6/site-packages/ufl/integral.py", line 94, in __rmul__
>    % (integrand.rank(), integrand.free_indices()))
>  File "/home/Mohseni/Work/FEniCS/lib/python2.6/site-packages/ufl/assertions.py", line 20, in ufl_assert
>    if not condition: error(*message)
>  File "/home/Mohseni/Work/FEniCS/lib/python2.6/site-packages/ufl/log.py", line 124, in error
>    raise UFLException(self._format_raw(*message))
> ufl.log.UFLException: Trying to integrate expression of rank 1 with free indices ().
>
> regards .
>
>
>
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>

i know that but i can't treat sigma as scalar because div in :
aa = C*(dot(sigmas, tau) + div(tau)*us + div(sigmas)*v)*dx
any idea ?