On 2012-12-16, =?utf-8?Q?foelsche at sbcglobal.net?= <foelsche at sbcglobal.net> wrote:
> Can anybody tell me, why this maxima source is not finishing....
Well, the problem is that the expressions you are working with are
enormous -- one of them has 100,000 terms or something like that. Maxima
is doing its best but there may not be enough time & memory to finish
the job.
As to the reason why the expressions are so big -- it's not clear if
it's inherent in the problem, or perhaps Maxima's heuristics for
simplification are actually working towards bigger & bigger expressions,
or something else.
I am working on an approach which keeps the expressions relatively
small. Basic idea is to construct a formal Taylor series & integrate it,
then substitute the actual expressions & actual values later. Trying to
construct the Taylor series seems to massively expand an already-large
expression ... I'll get back to you later today or tomorrow about it.
best
Robert Dodier
PS. Heroic debugging efforts notwithstanding, it would really help if
you could indicate what you have tried, what worked, what didn't, what
you're trying to accomplish, etc.