Hello,

I am trying to solve an equation of the form

$C_1 f(k_1 z) + C_2 f(k_2 z) + C_3 f(k_3 z) + C_4 f(k_4 z) = C_5 z^2$

for $f(z)$. Everything is complex. The $C_i$'s and $k_i$'s depend on some other parameters $\{ \lambda_i \}$ through a very complicated dependence.

Any ideas?

Thanks!