Proofs using cardinality $c$ of set $S$
106325
Question about Cardinality
91163
Let the set S be infinite, and the set T countably infinite. Show that S and S U T have the same cardinality
136069
Is there a simple formula for the cardinality of $\{A\subseteq\kappa\mid |A|\leq\lambda\}$ when $\lambda\leq\kappa$?
98518
Cardinality of equivalence relations on N
32081
The dual version of trichotomy of cardinality without AC
88904
Help with a proof. Countable sets.
158671
Cardinality of a set that consists of all existing cardinalities
144735
Possible cardinality of power sets
101993
The cardinality of a language over a set of variables $V$ with $\#V= κ$
44214
The number of subsets of a set of cardinality $n$
79568
Cardinality of the set $D$
5840
divides, not divides and cardinalities
35043
Cardinality of a set A is strictly less than the cardinality of the power set of A
16553
Cardinality of the set of all total orders on $\Bbb{N}$
136735
Why is the cardinality of set S is 3^n, where S is the collection of all ordered pairs of disjoint subset of {1,2,3,...,n} where n is non negative.
84198
Step in Proof of Cardinality of Product of two Groups
92639
Prove that the family of open sets in $\mathbb{R}$ has cardinality equal to $2^{\aleph_0}$