Originally Posted By: abacus9900

I just wonder if infinity is a useful concept.

According to QED when electron interacts with
vacuum its parameters becomes infinite.
It is possible only when vacuum is itself an infinite space.
So, we can be wondered or not, but vacuum as infinite space exists.
Questions:
Can infinity be a useful conception?
Does vacuum ( with its infinite space) have any utility?
And if vacuum is an useful space then . . . .
How can electron be reborn from infinite vacuum?
============
S