> Somebody just complained about this on gitter 
> > (https://gitter.im/sagemath/cloud): 
> > 
> > The simplify command is completely ignoring that the variable is 
> > supposed to be complex: 
> > ``` 
> > t = var('t', domain='complex') 
> > (conjugate(t)*t).simplify() 
> > ``` 
> > outputs `t^2`.     This seems like a bug. 
>
> sage: t = var('t', domain='complex') 
> sage: maxima(conjugate(t)), maxima(t) 
>
> outputs (_SAGE_VAR_t, _SAGE_VAR_t) 
>
> so basically conjugate(t) gets converted all wrong to maxima, or at 
> least that t is complex is instantly forgotten.  Hmm. 
>
>
This must be longstanding, because in Sage 4.4.4,

sage:  t = var('t', domain='complex') 
sage: maxima(conjugate(t)), maxima(t) 
(t, t)

Assuredly we aren't converting it properly. 

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