Forcing mathematica or geo sketch to graph EC

1. Jun 6, 2006

heartless

Hello, I'm trying to experiment with eliptic curves a little, but I have a problem with graphing elliptic curves. For example, neither mathematica nor geometry sketchpad graph negative values of curves. Is there anyway to force mathematica or geo sketchpad to plot also negative values of x?
F. ex, when I try to graph y=(x^3-x)^(1/2) it plots only positive values for function. Any ideas?

Thanks,

2. Jun 6, 2006

HallsofIvy

Staff Emeritus
Well, how about doing two functions:y=(x^3-x)^(1/2) and
y=-(x^3-x)^(1/2)?

3. Jun 6, 2006

Orion1

Mathematica:
$$\text{Plot[} ((-\sqrt{x^3 - x}), (\sqrt{x^3 - x})) \text{, (x,-10,10)}]$$

Where the brackets '()' are actually '{}'.

Last edited: Jun 6, 2006