>  min is a builtin python function and isn't smart
> about symbolic functions; it just returns the first thing when it comes
> to symbolic expressions:
>
...
> I would do this like:
>
> sage: min(f(-10,-10) for f in [e1,e2,e3])
> -127
>
> In other words, evaluate the functions before calling min.
>
> Jason

Thanks - that explains the problem but doesn't quite get where I
wanted to go.
Is there a version of min that understands symbolic functions?
I would like to be able to send the resulting equation to plot3d.

Mcdewey
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