Re: Separating real part and imaginary part from each other
- To: mathgroup at smc.vnet.net
- Subject: [mg101240] Re: Separating real part and imaginary part from each other
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Sat, 27 Jun 2009 06:06:26 -0400 (EDT)
- References: <h2295a$hoj$1@smc.vnet.net>
Hi,
f[z_] := (a*z + b)/(c*z + d)
f[x + I*y] // {Re[#], Im[#]} & // ComplexExpand
?
Regards
Jens
Alexander wrote:
> Hi,
>
> suppose I have the expression
>
> f(z) = (a*z+b) / (c*z+d) with z=x+I*y
>
> I did the calculation by hand and was able to separate real part fom
> imag. part to obtain something like this:
>
> g=f(x+I*y) = Re(g) + I * Im(g)
>
> But I don't know how to do this in Mathematica. I tried FullSimplify,
> Together, Apart, they didn't work. Can you help me?
>
> Alexander
>