Well, yes, I knew that was it but I don't know if bug reports on stuff in
the share/contrib would be acted upon. That is another concern.
Rich
----- Original Message -----
From: "Richard Hennessy" <rich.hennessy at verizon.net>
To: "Leo Butler" <l.butler at ed.ac.uk>
Cc: <maxima at math.utexas.edu>
Sent: Saturday, October 10, 2009 1:56 PM
Subject: Re: [Maxima] plotting a parametric integral
> Well, yes, I knew that was it but I don't know if bug reports on stuff in
> the share/contrib directory should get a bug report.
>
> Rich
>
> ----- Original Message -----
> From: "Leo Butler" <l.butler at ed.ac.uk>
> To: "Richard Hennessy" <rich.hennessy at verizon.net>
> Cc: "Stanislav Maslovski" <stanislav.maslovski at gmail.com>;
> <maxima at math.utexas.edu>
> Sent: Saturday, October 10, 2009 4:55 AM
> Subject: Re: [Maxima] plotting a parametric integral
>
>
>>
>>
>> On Fri, 9 Oct 2009, Richard Hennessy wrote:
>>
>> < Of course as stated before if k is known then Maxima can do the
>> problem.
>> It
>> < cannot do the general case for arbitrary k.
>> <
>> <
>> < Rich
>> <
>> < ----- Original Message ----- From: "Richard Hennessy"
>> < <rich.hennessy at verizon.net>
>> < To: "Leo Butler" <l.butler at ed.ac.uk>; "Stanislav Maslovski"
>> < <stanislav.maslovski at gmail.com>
>> < Cc: <maxima at math.utexas.edu>
>> < Sent: Friday, October 09, 2009 9:04 PM
>> < Subject: Re: [Maxima] plotting a parametric integral
>> <
>> <
>> < > This integral cannot be done by Maxima. Try
>> < >
>> < > (%i4) display2d:false;
>> < >
>> < > (%o4) false
>> < > (%i5) load(noninteractive);
>> < >
>> < > (%o5)
>> < >
>> "C:/Maxima-5.19.2/share/maxima/5.19.2/share/contrib/noninteractive/noninteractive.mac"
>> < > (%i6) integrate(exp(%i*k*x)*sin(x)/x,x,minf,inf);
>> < >
>> < > (%o6) if k-1 < 0 then integrate(%e^(%i*k*x)*sin(x)/x,x,minf,inf)
>> elseif
>> < > equal(k-1,0) then %pi else 0
>> < >
>> < > The answer shows that when k-1<0 Maxima can't do the integration.
>>
>> Rich,
>> This shows a weakness in the noninteractive code. If you walk through
>> the cases that 'integrate' throws up, you will see that it does
>> correctly identify all the various conditions on k. The noninteractive
>> result you show is not following the various cases that are thrown up.
>>
>> Leo
>>
>> --
>> The University of Edinburgh is a charitable body, registered in
>> Scotland, with registration number SC005336.
>>
>>
>
>
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