Dear all, i'm solving a problem with nonlinear poisson equation. But i have found on the website 2 explanations about that equation, but this both don't match with each other. Here a general nonlinear equation was discussed: http://fenicsproject.org/documentation/tutorial/nonlinear.html
Using the equation Nr. 9 of the tutorial for the other specific equation here: http://fenicsproject.org/documentation/dolfin/dev/python/demo/documented/nonlinear-poisson/python/documentation.html cozuld i could not come up to the derivative of F'(uh;δu,v). Could someone explain me, how can i fit the derivative from the tutorial to the derivative from the specific equation of nonlinear-poisson. I would be really happy with any explanation!! Best To
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