- #1

Karlisbad

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**Differential equation??**

Let be F a functional of f(x) and J(x) and A(x) a function, then can we solve this?:

[tex] A(x)\frac{\delta F[f]}{\delta f}+J(x)F[f]=0 [/tex]

J and A are known functions and F[f] is an unknown functional satisfying the equation above.