
Re: complex conjugation by star
Posted:
Apr 21, 2014 5:11 AM


I have used the following for many years
Clear[x, aaa, bbb] SuperStar[x_] := x /. Complex[aaa_, bbb_] > Complex[aaa, bbb]
(The SuperStar[x_] translates to x_^*)
No problems. Also, no highlighted asterisk.
Kevin
On 4/20/2014 4:47 AM, Murray Eisenberg wrote: > 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 > > > > > > >

