You can see in such a function, there are some points in space in which the value of the function reaches infinity (Those empty areas in the on the x and y axis).
The infinity region can be things other than just some points. It may be a disk or a line that in any point of that region, the value is infinity.
ONLY those infinity areas are of my interest! How to visualize that? for example Mathematica colors any region which has infinity value, red.
Can anyone help me?