
Re: complex conjugation by star
Posted:
Apr 20, 2014 4:47 AM


I don't see how your definition can be valid. When I type input
f_*:=f/.Complex[u_,v_]>Complex[u,v]
I see a highlighted asterisk, indicating a syntax error.
On Apr 18, 2014, at 1:46 AM, Brambilla Roberto Luigi (RSE) <Roberto.Brambilla@rseweb.it> wrote:
> 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 > > > > Murray Eisenberg murray@math.umass.edu Mathematics & Statistics Dept. Lederle Graduate Research Tower phone 240 2467240 (H) University of Massachusetts 710 North Pleasant Street Amherst, MA 010039305

