
Re: complex conjugation by star
Posted:
Apr 20, 2014 4:46 AM


Rob 
This will give you what you want:
SuperStar[f_?NumberQ]:=Conjugate[f] SuperStar[f:_[___]]:=SuperStar/@f
Cheers, Dave Snead
Original Message From: Brambilla Roberto Luigi (RSE) Sent: Thursday, April 17, 2014 10:46 PM Subject: complex conjugation by star
I have defined the following useful star complexconjugation (common star exponent notation)
f_*:=f/.Complex[u_,v_]>Complex[u,v]
and it works fine. For example BesselJ[2,x+I y]* gives BesselJ[2,xI y] etc...(x,y defined/undefined). Also it is listable on number lists
{1+i2, 5+i6}* gives {1i2, 5i6} .
Unfortunately it does not work on symbols, i.e. A* gives A even if I have defined A as a complex number by means of Element[A, Complexes]. Similarly if I define Element[{A,B,G}, Complexes]
{A,B,G}* gives {A,B,G} and (A+B+G)* gives A+B+G.
I'd like to obtain {A*,B*,G*} and A*+B*+G* ( ! )
Is it possible to fix this deficiency, unpleasant in manipulating general expressions where is not known if symbols represent real or complex variables ?
Many thanks! Rob
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