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[Bento <question152914@xxxxxxxxxxxxxxxxxxxxx>]

New question #152914 on DOLFIN:
https://answers.launchpad.net/dolfin/+question/152914

Hi,

I want to solve a PDE on a one-dimensional domain. The equation involves a first derivative. How do I express this in 1D? Here is (basically) my equation: 

dT/dx + d^2T/dx^2 = 0

and weak form

a = (grad(T)*v - inner(grad(T), grad(v)))*dx

with testfunction v and trialfunction T. When I use grad(T), I get a "shape mismatch in sum" error. The mesh is Interval(100, 0, 10)

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