What are denumerable sets exactly?
27290
What Does it Really Mean to Have Different Kinds of Infinities?
122947
What is the cardinality of the set of infinite cardinalities?
118824
What is the complement of empty set?
132692
Nonempty set mapped to $\emptyset$ and vice-versa
54406
Is $\mathbb Q \times \mathbb Q $ a denumerable set?
108922
Cardinality and infinite sets: naturals, integers, rationals, bijections
129205
A question about uncountable, dense sets in R
145781
Is the collection of all functions between two sets a set?
157513
How can I prove that these sets are countable infinite?
15438
do all uncountable sets have same cardinality as real numbers?
20973
How can I find all the subsets of a set, with exactly n elements?
3636
Are any two uncountable sets similar to each other?
8082
What is A Set Raised to the 0 Power? (In Relation to the Definition of a Nullary Operation)
110957
No non-trivial clopen sets in $\mathbb{R}$? How to give a direct proof?
10472
Is every set a subset?
36315
Is $[0,1]$ a countable disjoint union of closed sets?
19138
If every object in math can be reduced to sets, how are tuples explained via sets?