How many cardinals exist between $\aleph_0$ and $\mathfrak c$?
6427
how many infinite cardinals are smaller than $\aleph$?
117047
exponentiation of cardinal number
70164
Proof exercise that the cardinal number of a set in $\mathbb R^2$ is $\frak c$
68230
The cardinality of a countable union of sets with less than continuum cardinality
20085
What's the cardinality of all sequences with coefficients in an infinite set?
22232
Proving that cardinality of the reals = cardinality of $[0,1]$
13924
For all infinite cardinals $\kappa, \ (\kappa \times \kappa, <_{cw}) \cong (\kappa, \in).$
73850
Cardinality of set of functions
108957
Cardinality of a totally ordered union
79974
The cardinality of Lebesgue sets
72750
Uncountable number of mutually disjoint countable sets in $\mathbb R$
109054
Given an infinite set of cardinality $X$, is there a chain in $\mathcal P(X)$ of the same cardinalty of $\mathcal P(X)$?
79778
$\kappa\cdot\kappa= \kappa,$ for infinite cardinals
82628
Cardinality of a set of closed intervals
64500
$\aleph_1 = 2^{\aleph_0}$
150605
Existence of a regular uncountable $\aleph_{\alpha}$ without $\mathsf{AC}$
1396
cardinality of all real sequences