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.

```

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