Infinity is a much studied concept in mathematics; the problem is not that we don't know what infinity is but that we know it's not part of the set of integer n

Infinity is a much studied concept in mathematics; the problem is not that we don't know what infinity is but that we know it's not part of the set of integer numbers, real numbers, etc. But there are many ways to work with infinities, and even to include it in the number sets (for example, in the case of hyper-reals).