Searching for an asymptotic to exp[0.5]
I considered exp(exp(x)) by studying the Bell Numbers and Lambert W.
If my calculations are correct, the fake coëfficiënts and the derivatives match very well.

In fact the correcting factor is sqrt( 2 pi n ) (1 + log(n)^C).

I have yet to determine C but it Will be close to -4 < C < 4.

Very similar like with exp(x) !

And like exp^[1/2].

The difficulty with these computations is having good enough estimates for the analogues of Bell and Lambert W.

Fake function ideas seem to show these estimates relate , without computing the estimates first !

I noted that the gaussian method gives a slightly different result. More specific it adds a log factor.

The value of C Will determine if the gaussian beats S9, but my bet is it does.

This also explains the ln part of tpid 17.
Let me explain :

Notice that any function f bounded by exp^[A] above and exp^[B] below , Will satisfy on average

f ' ' (x) / f(x) < O ( ln(f(x)) )^(2+ eps)

Hence we get the ln part.

In fact by this argument we need

O ( sqrt(n) ln(n) ln^2(n) ln^3(n) ... )

As error in tpid 17.
And add the bounds too.

Regards

Tommy1729
Reply


Messages In This Thread
RE: Searching for an asymptotic to exp[0.5] - by tommy1729 - 09/30/2015, 12:25 PM

Possibly Related Threads…
Thread Author Replies Views Last Post
Question Tetration Asymptotic Series Catullus 18 22,322 07/05/2022, 01:29 AM
Last Post: JmsNxn
  Using a family of asymptotic tetration functions... JmsNxn 15 24,696 08/06/2021, 01:47 AM
Last Post: JmsNxn
  Reducing beta tetration to an asymptotic series, and a pull back JmsNxn 2 6,846 07/22/2021, 03:37 AM
Last Post: JmsNxn
  A Holomorphic Function Asymptotic to Tetration JmsNxn 2 6,279 03/24/2021, 09:58 PM
Last Post: JmsNxn
  An asymptotic expansion for \phi JmsNxn 1 4,863 02/08/2021, 12:25 AM
Last Post: JmsNxn
  Merged fixpoints of 2 iterates ? Asymptotic ? [2019] tommy1729 1 8,048 09/10/2019, 11:28 AM
Last Post: sheldonison
  Another asymptotic development, similar to 2sinh method JmsNxn 0 6,948 07/05/2011, 06:34 PM
Last Post: JmsNxn



Users browsing this thread: 2 Guest(s)