6 ms·
How do we know that the infinity is countable from the context?
by johnhenry 9y ago
How do we know that the infinity is countable from the context?
- poizan42 9y agoWell, the argument is that for any natural number n we can make an n-gon. So we have a one-to-one correspondence between natural numbers and dimension 2 polytypes, so by definition the cardinality of that set is aleph zero