If I do a region plot of the following inequality,
RegionPlot[(4 - y^2)^2 ((8 + y^2) - 18 x y + 9 x^2) >
36 (1 - y^2) ((4 + y^2) - 8 x y + (4 + y^2) x^2) && x >= y, {x, 0,
1}, {y, 0, 1}]
Mathematica plots a region where it is valid:
However, if I change x >=y
to x>y
inside the RegionPlot
command, the region vanishes altogether. I know that the diagonal line is x=y
, but there clearly is a finite region where x>y
is true and Mathematica does not displays that. Am I missing something?