```Date: Apr 20, 2014 4:47 AM
Author: Murray Eisenberg
Subject: Re: complex conjugation by star

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@rse-web.it> wrote:> I have defined the following useful star complex-conjugation (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,x-I y]  etc...(x,y defined/undefined).> Also it is listable on number lists>> {1+i2, 5+i6}*  gives  {1-i2, 5-i6} .>> 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.eduMathematics & Statistics Dept.      Lederle Graduate Research Tower      phone 240 246-7240 (H)University of Massachusetts               710 North Pleasant Street                Amherst, MA 01003-9305
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