well, Kermi wanted to see some good discussions going here again...so I will start one...
This is about mathematical theory.
Many like to view mathematics, or numbers rather, as a circle.
Since numbers are infinite, and have no end, many like to view numbers as an endless circle....almost like a recursive function with no exit condition. the number line is viewed as continuously going around that circle.
others view it as just an endless line....with simply no end...this view originally spawned the circle view...as many people believe that the two ends of the line would eventually hit each other...
another view is the figure 8 theory...with positive numbers on one end of the 8, and negative numbers on the other end of the 8...
which theory do u like? and give support for your theory.