2 ms·
Nope. Is the empty set countable? (Yes.) Dictionary: nat·u·ral num·bers the positive integers (whole numbers) 1, 2, 3, etc., and sometimes zero as well C
by lupire 4y ago
Nope.
Is the empty set countable? (Yes.)
Dictionary:
nat·u·ral num·bers
the positive integers (whole numbers) 1, 2, 3, etc., and sometimes zero as well
Countable:
https://en.wikipedia.org/wiki/Countable_set https://en.wikipedia.org/wiki/Countable_set
Set theory:
https://en.wikipedia.org/wiki/Ordinal_number https://en.wikipedia.org/wiki/Ordinal_number
- atwood22 4y agoFrom your own link on countable sets: > Equivalently, a set S is countable if there exists an injective function f : S → N from S to N; it simply means that every element in S corresponds to a different element in N. Defining N is usually done via a successor set, on which case 0 makes no sense to include.
- lupire 4y agoA successor set is the set of successors of... 0 or 1, depending on what you are doing.
- deleted 4y ago[deleted]