Symbolic complex conjugation?

*To*: mathgroup at smc.vnet.net*Subject*: [mg89919] Symbolic complex conjugation?*From*: AES <siegman at stanford.edu>*Date*: Tue, 24 Jun 2008 03:31:05 -0400 (EDT)*Organization*: Stanford University

I'm sorry, but I just don't understand why the following test case works just fine: [In copying it, I've substituted "Isymbol" for the \[ImaginaryI] that actually appears in the Out[] cells.] In[202]:= eqna={a+I b==0}; solna=Solve[eqna,b]; b=b/.solna[[1]]; bStar=b/.{I->-I}; {b, Star} Out[205]={ -Isymbol a, Isymbol a } but the actual calculation that prompted the test case doesn't: In[206]:= eqnp={((dwa/2)+I(w-wa))p-I (kappa/(2 w))dN e==0}; solnp=Solve[eqnp,p]; p=p/.solnp[[1]]; pStar=p/.{I->-I} Out[208]= { (dN e kappa)/(w (-Isymbol dwa+2 w-2 wa)), (dN e kappa)/(w (-Isymbol dwa+2 w-2 wa)) } And actually, I guess my real concern is not understanding "how it happens" -- but more "how it can happen" that Mathematica can do something this potentially damaging to some innocent user.

**Follow-Ups**:**Re: Symbolic complex conjugation?***From:*Murray Eisenberg <murray@math.umass.edu>

**Re: Symbolic complex conjugation?***From:*Andrzej Kozlowski <akoz@mimuw.edu.pl>