Re: " What means (x)^[1/2] , x a real variable "


alainvergh...@xxxxxxxx wrote:
> Here we consider real functions x is one of them and real
> variables ; [1/2] stands for half iterated.
> Your answer ?
> = x , -x , k/x , k-x k a real constant # 0
> anything else ?

This is meaningless. You can't "iterate" a function a
"fractional number of times". Obviously there is a set of
2^(2^aleph_0) functions f such that f(f(x))=x, and no reason
to call any of these *the* "half-iterate".

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