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Mar 31, 2013 at 18:56 comment added gerw Sorry, I misunderstood your "iterate" (I thought of "power").
Mar 31, 2013 at 9:25 comment added Etienne Or $\varphi(x)\equiv\frac12$...
Mar 31, 2013 at 8:27 comment added Sergei Ivanov Why $\varphi_\infty=0$? What is $\varphi(x)=x$?
Mar 31, 2013 at 8:06 history answered gerw CC BY-SA 3.0