Maybe this article is way over my head, but is it not really simple?
If my function to generate a circle is a simple for loop 0 to 2 PI.
Then the inverse of that maps each point on the circle back to a line with points between 0 and 2 PI.
If my function to generate a circle is a simple for loop 0 to 2 PI.
Then the inverse of that maps each point on the circle back to a line with points between 0 and 2 PI.
This article is instead talking about the inverse per the identity a * 1/a = 1.