Not sure what you have in mind here.
Why are you using ev(...) at all? What do you expect that to do?
What do you expect diff( conjugate( f(x) ) ) to be? After all, the
conjugate function is not differentiable.
Maxima has conjugate(kx*sin(x)) => kx*sin(x) because it assumes (unless told
otherwise) that all variables are real, and conjugate(x)=x for x real. But
it assumes that arbitrary functions like kx(x) are in general complex.
-s
On Tue, May 24, 2011 at 12:17, Christian Weickhmann <
weickhmann at imp.tu-darmstadt.de> wrote:
> Hi!
>
> I just ran into a problem with Maxima (v. 5.22.1) when evaluating the
> following
> expression:
>
> ev(
>
> %i*cos(kx*x)*diff(conjugate(kx(cos(kx*x))),x,1)*epsinvLC_yy*gamma+%i*cos(kx*x)*diff(kx(cos(kx*x)),x,1)*epsinvLC_yy*gamma);
>
> Basically what happens is: the two diff() get single-quoted
> automatically although I never requested it.
> Funny enough, when calling
>
> ev( diff(conjugate(kx(cos(kx*x))),x,1) );
>
> that just turns out fine.
>
> I made no assumptions about the variables. But assuming all of them (but
> x) positive, does not change the unwanted single-quoting.
>
> Is there anything I can do to *force* Maxima to evaluate the diff()?
>
> Regards,
> Christian
>
>
> --
> Dipl.-Ing. Christian Weickhmann
>
> Technische Universit?t Darmstadt
> Insitut f?r Mikrowellentechnik und Photonik
> Mikrowellentechnik / Microwave Engineering
> www.imp.tu-darmstadt.de
>
> Merckstr. 25
> 64283 Darmstadt
> Germany
>
> Office: S3|06-318
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> E-Mail: weickhmann at imp.tu-darmstadt.de
>
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