Jeff Grossman
Jeff Grossman
Adding to what Mark wrote: Because we cannot do ordinary arithmetic on infinities, Cantor treats them as sets.originally posted by Jonathan Loesberg:
This may be like dark holes, and I will understand the theory without really comprehending it, but how can one infinity be larger than another, since both are infinite.
The infinite set of integers naturally has infinite members.
How about the infinite set of real numbers? We can't count them, of course, but we can ask whether every member of the set of real numbers can be paired with a member of the set of integers.
The answer is: certainly not!, for the reason already given (that every pair of integers indicates an infinite number of reals).
Thus the two infinities are different in their cardinality.