Re: Tetration again!

Am 20.12.2007 20:14 schrieb galathaea:
one was issued by the tata institute
just as a photocopy
the other is a nicely edited one by bruce berndt

the berndt editing has known proofs
and other very useful exposition
separated into 5 books

chapter 4 of ramanujan's notebooks
is found in book 1 of berndt
which he titles:
"iterates of the exponential function
and an ingenious formal technique"

entries 1 thru 7 (and their corollaries)
give his basic results
including basic recursions
series identities
an integral formula
and (as always for ramanujan) asymptotics

Ah - thank you very much!

Gottfried
.

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