Two types of tetration : sexp ' > or < 1.
#4
Ok here is an idea for uniqueness or at least putting solutions in category.

f(x) is an analytic function on [0,oo] such as analytic semiexp(x) or tet(x), so the idea is general.

More specific

Let f^{n} mean n th derivative of f.

say f(z) satisfies 

f(0) = 0

f(1) = 1

f(x+1) = exp(f(x))

f ' (0) = f '(1) = c ( a given c )


then 

TR( f(x) ) = integral from 1 to infinity  sum_(n>=0)  (f^{n}(x))^(-2) dx

LET Min TR( f(x) , c ) = G©

where the minimum is for a fixed c , and f(x) is picked to get a minimum value.  

Then we wonder what G© is as a function of c.

And how many analytic solutions f(x) exist with the same G© value.

We can further wonder what value of c makes G© at minimum.


Notice that TR can diverge for non tetration like functions.

Adding a weight might help there.


the details for systematic adding weights needs to be investigated.


regards

tommy1729
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Messages In This Thread
RE: Two types of tetration : sexp ' > or < 1. - by tommy1729 - 10/17/2023, 12:06 PM

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