A question in set theory
48804
Enumeration of rationals from Stein-Shakarchi's Real Analysis (Chapter 1, Exercise 24)
19414
Uncountable subset with uncountable complement, without the Axiom of Choice
66301
The cardinality of the set of countably infinite subsets of an infinite set
20004
Meta Theory when studying Set Theory
22498
In set theory, how are real numbers represented as sets?
136835
ZF Set Theory - If $|A|^{|B|} = |B|$, then $|A| = 1 = |B|.$
7112
Product of sets and supremum
140668
Union of $2$ set $A, B$ where $ A$ is a subset of $B$
858
Is $\{\emptyset\}$ a subset of $\{\{\emptyset\}\}$?
93771
Prove that for any set $A$ there is some $x \notin A$
122947
What is the cardinality of the set of infinite cardinalities?
141299
Alternative set theories
70940
Homework - set theory infinite union
156006
Cardinality of set containing all infinite subsets of $\mathbb{Q}$
43024
Well-ordered sets, properties of an element that is not largest in the set
134071
If A is a finite set and B is an infinite set, then B\A is an infinite set
24050
Characterization of the Closure of a Set