If I type the following into Sage (which is straight from the
implicit_plot documentation), I get a black square:
x,y=var('x,y')
f(x,y) = x^2 + y^2 - 2
implicit_plot(f, (-3, 3), (-3, 3),fill=True).show(aspect_ratio=1)
Of course, if you remove "fill=True", then everything works as
expected. The documentation should probably remove the "fill=True",
right?
Dana
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