Comment #19 on issue 797 by smi...@gmail.com: Should Lambda accept
Functions as variables?
http://code.google.com/p/sympy/issues/detail?id=797
If a function is detected, Subs can be used to deal with it:
H = Lambda(y, Derivative(Subs(u, u, y), x, x) + x**2 * y)
H(f(x)).doit()
x**2*f(x) +
Updates:
Summary: Should Lambda accept Functions as variables?
Status: NeedsDecision
Comment #18 on issue 797 by asmeu...@gmail.com: Should Lambda accept
Functions as variables?
http://code.google.com/p/sympy/issues/detail?id=797
NeedsReview means that there is a pull request
