05/09/2010, 11:35 AM

(05/03/2010, 09:27 PM)kobi_78 Wrote: Why does what Ansus wrote fails for a = e, for instance?

For regular iteration you need a fixed point.

Real fixed points exist only for base .

Of course you can do it also at a complex fixed point of however then the resulting tetration is not real on the real axis (actually it is not even analytic).