[Maxima] challenge for trigsimp

[Richard Hennessy]

I guess it is okay that they can't do it.  pwsimp() can do it, which I forgot about (even though I wrote it).

(%i1) pwsimp(((signum(x - 1) + 1) * signum(x + 1) - signum(x - 1)),x);
(out1) 1 

Never mind.

Rich



Richard Hennessy wrote:
> (%i1) ratsimp(( (signum(x - 1) + 1) * signum(x + 1) - signum(x - 1)));
> (out1)                                       (signum(x - 1) + 1) signum(x + 1) - signum(x - 1)
>
> (%i3) radcan( (signum(x - 1) + 1) * signum(x + 1) - signum(x - 1));
> (out2)                                       (signum(x - 1) + 1) signum(x + 1) - signum(x - 1)
>
> (%i4) factor( (signum(x - 1) + 1) * signum(x + 1) - signum(x - 1));
> (out4)                                  signum(x - 1) signum(x + 1) + signum(x + 1) - signum(x - 1)
>
> (%i5) expand( (signum(x - 1) + 1) * signum(x + 1) - signum(x - 1));
> (out5)                                  signum(x - 1) signum(x + 1) + signum(x + 1) - signum(x - 1)
>
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