4 ms·You’re thinking of isomorphic, not equal.by srcreigh 3y agoYou’re thinking of isomorphic, not equal.chowells 3y agoThey meant "their cardinalities are equal". It's honestly an easy mistake to make, especially if typing on a small screen. Or especially if having a discussion where sizes of infinity are already being discussed.FabHK 3y agoequal in cardinality, yes, thanks.