William Stein wrote:
>
> In case my response above was ambiguous, I'm very much in favor of their
> being a way to change how the symbolic I prints. Wait a minute, I just
> realized
> that I designed and imlemented a very nice way to do this sort of thing over
> THREE YEARS ago, but nobody ever seemed to use it. Check this, which has
> worked (more generically) since Sage-1.0:
>
> sage: I.rename('_j')
> sage: I
> _j
> sage: expand((1+i)^2)
> 2*_j
> sage: expand((2+3*i)^2)
> 12*_j - 5
>
> You can actually rename most anything that isn't defined by Cython code:
>
> sage: f = sin(2*I) + cos(3*x); f
> cos(3*x) + _j*sinh(2)
> sage: f.rename('fred')
> sage: f
> fred
Nice. So to get the other (easy) part of the request:
sage: _j = I
sage: _j
I
sage: _j.rename("_j")
sage: _j
_j
sage: sqrt(-1)
_j
sage: _j^2
-1
Thanks William! One of these days, we'll catch up to what you did years
ago :).
Jason
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