Hello, I want to differentiate an integral with a certain power :
My idea of code is the following :
T = theta* stress(Sym(Grad(u))) *dx
LF = LinearForm(pwc)
gfpwc= pwc.TestFunction()
# gfRho = theta :
LF += (T**p).Diff(gfRho, gfpwc)
LF.Assemble()
The problem is that I can’t differentiate an Integral to a certain power. I can for the integrale alone, but not with the power.
I have the following error :
Do you have any clue for my question ?
Thank you 