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Oct 28, 2012 at 22:16 vote accept James77
Oct 28, 2012 at 19:01 comment added Federico Poloni Take $\phi(x)=x^{16}$, $d=0$. If you perturb $d$ to $10^{-16}$, then the unique real solution of the equation changes from $x=0$ to $x=10^{-1}$.
Oct 28, 2012 at 18:14 comment added James77 That is interesting. Do you know of any examples?
Oct 28, 2012 at 11:11 history answered Federico Poloni CC BY-SA 3.0