What does infinity look like in numbers?

Infinity is technically an innumerable concept. The way most mathematicians describe it is to use an ellipsis ("...") to state that a concrete pattern continues to infinity. For example, the set of integers is usually noted as { ... -3, -2, -1, 0, 1, 2, 3, ... }, implying that every negative whole number comes before it and every positive number comes after it. For, say, a sequence of numbers starting at 1 and multiplying each term by half, you'd see { 1, 1/2, 1/4, 1/8, 1/16, ... }.