Hi all ! I came across an article (link: http://www.math.toronto.edu/mathnet/answers/infinity.html#2) The article states that in the context of a number system, infinity does not exist. Now, being the dimwit that I am, I just wanted to ask/confirm this: I THINK the article is saying that one cannot perform arithmetic operations like addition, subtraction etc. using infinity (plz do correct me if I'm wrong). If so, this would mean one simply cannot perform operations like: infinity + infinity = infinity OR infinity - infinity = ? OR 3 * infinity = infinity Wouldn't all such operations be "illegal"? (this would of'course depend on whether I understood that article correctly). Thanking you in advance, Asif.