Hello Mr Kaiser
Thanks for your help.
Unfortunately, I'm not a specialist in Maxima or Lisp, but merely a
beginning user (electronics engineer).
I don't know how to include the patch (didn't find anything in the
documentation ...)
I've included the batch-file : cylinder.mac from
http://www.csulb.edu/~woollett/
With the batch-file you will see that the laplacian, divergence and curl
isn't calculated correctly in cylindrical coordinates.
Hope this helps.
Best regards,
Bruno Torremans
On 10/06/2010 10:50 PM, Dieter Kaiser wrote:
> Am Montag, den 04.10.2010, 18:38 +0200 schrieb Bruno Torremans:
>
> Helle Bruno,
>
> I have not looked through your posting in detail, but I think the
> problem might be due to an error I have introduced unfortunately between
> Maxima 5.21 and Maxima 5.22.
>
> If I am right and this error is the problem you have to load the
> following code in Maxima to get the expected behavior:
>
> (defun depends (e x&aux l)
> (setq e (specrepcheck e))
> (cond ((alike1 e x) t)
> ((mnump e) nil)
> ((and (symbolp e) (setq l (mget e 'depends)))
> ;; Go recursively through the list of dependencies.
> ;; This code detects indirect dependencies like a(x) and x(t).
> (dependsl l x))
> ((atom e) nil)
> (t (or (depends (caar e) x)
> (dependsl (cdr e) x)))))
>
>
> If you have problems to load this patch, please send an email to the
> list again and I will give more help.
>
> By the way, it is much better to give only one short example, which I
> can cut out from the bug report and insert directly in my Maxima
> session. I suppose the patch from above will solve the problem, but at
> the moment I have not enough time to figure out a good test case from
> the reported examples.
>
> Dieter Kaiser
>
>
>
>
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