-Infinity doesn't exist.

1.There can be no number larger than infinity.
2.The sum of all numbers from -inf to inf is larger than infinity.
OR
2.The sum of all number from -inf to inf is infinity.
3.There cannot exist a -inf. It is inherent in saying "infinity"

>>6
Space doesn't have to "end" to be finite. You can walk around and around and around the Earth for as long as you want, but that does not mean the Earth has infinite surface area.