Not so clear a bug.
(n-m)/(n-m) simplifies to 1.
But if you know n=m, then you have 0/0. So is it a bug if (n-m)/(n-m) -->
1?
Answer: maybe. But not clear :)
RJF
> -----Original Message-----
> From: maxima-bounces at math.utexas.edu
> [mailto:maxima-bounces at math.utexas.edu] On Behalf Of John Pye
> Sent: Tuesday, September 09, 2008 6:47 PM
> To: maxima at math.utexas.edu
> Cc: Edwin Woollett
> Subject: Re: [Maxima] integrate returns undefined
>
> I can confirm that behaviour; it looks like a clear bug to me.
>
> Cheers
> JP
>
> Edwin Woollett wrote:
> > integrate(..) returns undefined when it
> > should know the answer.
> >
> > (%i1) declare( [ m, n ], integer )$
> > (%i2) assume ( m > 0, n > 0 )$
> > (%i3) integrate( cos(m*x)^2, x, 0, 2*%pi );
> > (%o3) %pi
> > (%i4) integrate( cos(m*x)*cos(n*x), x, 0, 2*%pi );
> > Is n - m positive, negative, or zero?
> >
> > zero;
> > (%o4) undefined
> >
> > Is this a known bug?
>
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