Cardinality of subsets with fixed cardinal of a set
32965
Proving that for infinite $\kappa$, $|[\kappa]^\lambda|=\kappa^\lambda$
104744
Can sets of cardinality $\aleph_1$ have nonzero measure?
147136
Subset of a countable set is itself countable
70164
Proof exercise that the cardinal number of a set in $\mathbb R^2$ is $\frak c$
79568
Cardinality of the set $D$
79974
The cardinality of Lebesgue sets
57822
Number of ways to choose two disjoint subsets of a set
13273
Cardinality of the set of all real functions of real variable
32081
The dual version of trichotomy of cardinality without AC
64519
Subsets of a list
82207
Number of Pairs of Subsets
23442
Cardinality of the union of infinite and countable sets
89712
For every set $A$, the empty set is a subset of $A$. The empty set is a set. Therefore, the empty set has a cardinality $\geq 1\ldots$
144821
Number of ordered pairs of subsets
150790
Prove two sets have same Cardinality by writing down bijection
127233
Cardinality of order types in $\mathbb{N}$
147484
For a set with N members, what is the number of set partitions in which each subset is either of size 1 or 2?