I've been trying to use SymPy to apply the variational operator in some
functions but I believe I am not in the right way.
I have this toy example and the expected result below:
import sympy
from sympy import Function as f
sympy.var('x, t')
N = f('N')(x,t)
w = f('w')(x,t)
test = N*w.diff(x, x)
print test
#N(x, t)*Derivative(w(x, t), x, x)
#expected results after applying the variational operator (\delta)
# \delta{Derivative(w(x, t), x, x)}*N + Derivative(w(x, t), x, x)*\deltaN
Is there such operator in SymPy?
Thank you in advance!
Saullo
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