Question #96571 on DOLFIN changed:
https://answers.launchpad.net/dolfin/+question/96571
Status: Open => Answered
Nuno Lopes proposed the following answer:
I guess it could be done in the ufl form file:
Something like (appart from the time discretization algorithm)
element = FiniteElement("Lagrange", triangle, 1)
v = TestFunction(element)
u = TrialFunction(element) # Unkown Function
u_old =Function(element) ##Known Function from the last step
##
a=u*v*dx+inner(grad(u),grad(v))*dx
L=u_old*v*dx+v*0.1/(exp(u_old-2))*dx
Hope it helps.
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