Yes.

On 14 October 2014 10:59, Johan Hake <[email protected]> wrote:

> Yes, it looks like you are correct Miroslav.
>
> I suppose the line you link to should add a self check too. Changing that
> line to
>
>   if f._ufl_is_terminal_ and f != v:
>
> fixes the problem.
>
> Is this fix something we just can add Martin?
>
> Johan
>
> On Tue, Oct 14, 2014 at 10:14 AM, Miroslav Kuchta <[email protected]>
> wrote:
>
>>  Hi, this seems to be due the simplification made here
>> <https://github.com/FEniCS/ufl/blob/master/ufl/differentiation.py#L87>
>>
>> from dolfin import *
>>
>> mesh = UnitSquareMesh(10, 10)
>> V = FunctionSpace(mesh, "CG", 1)
>> u = Function(V)
>>
>> # 0
>> print u._ufl_is_terminal_
>> print diff(u, u)
>>
>> # 1
>> print (Constant(1)*u)._ufl_is_terminal_
>> plot(diff(Constant(1)*u, u), mesh=mesh)
>>
>> # 1
>> u._ufl_is_terminal_ = False
>> plot(diff(u, u), mesh=mesh)
>> interactive()
>>
>>  Regards, Miro
>>
>> On 10/13/2014 10:32 PM, Johan Hake wrote:
>>
>> from dolfin import *
>> mesh = UnitSquareMesh(10, 10)
>>  V = FunctionSpace(mesh, "CG", 1)
>> u = Function(V)
>>  print diff(u, u)
>>
>>
>>
>
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