An elementary question about cardinal arithmetic without AC
3902
Does $k+\aleph_0=\mathfrak{c}$ imply $k=\mathfrak{c}$ without the Axiom of Choice?
20085
What's the cardinality of all sequences with coefficients in an infinite set?
82628
Cardinality of a set of closed intervals
80019
$\varepsilon$-number countability without choice
68230
The cardinality of a countable union of sets with less than continuum cardinality
83842
Alternate proofs (other than diagonalization and topological nested sets) for uncountability of the reals?
139992
Is power-associativity finitely axiomatizable?
63489
The class of cardinal numbers is well ordered
3217
Construction of uncountably many non-isomorphic linear (total) orderings of natural numbers
23141
How to prove that from "Every infinite cardinal satisfies $a^2=a$" we can prove that $b+c=bc$ for any two infinite cardinals $b,c$?
102972
Cardinality of $\mathbb{R}^\mathbb{R}$ by diagonal argument
157187
Why $\omega+1$ and $\omega^2$ are not cardinal numbers?
7785
Cardinality of sum-set
10839
Problem in Cardinality and Order
89167
Cardinality of equivalence relations in $\mathbb{N}$
45218
Comparing the two cardinals $\aleph_0^{\aleph_0}$ and $2^{\aleph_0}$
79725
Fields of arbitrary cardinality