Cardinality of the set of all natural sequences is $2^{\aleph_0}$
20085
What's the cardinality of all sequences with coefficients in an infinite set?
114262
Find the cardinality of the following set $S_n=\{(x,y)|x^2+y^2=n, \text{where }x,y,n \in \mathbb Z\text{ and }n\geq0 \}$
12436
The cardinality of the set of all finite subsets of an infinite set
41783
Cardinality of the Cartesian Product of Two Equinumerous Infinite Sets
83518
Proving Two sets have same cardinality
108922
Cardinality and infinite sets: naturals, integers, rationals, bijections
71133
prove inequlity about cardinality power sets
81509
The cardinality of a countable union of countable sets, without the axiom of choice
40071
What is the cardinality of the set of all topologies on $\mathbb{R}$?
104744
Can sets of cardinality $\aleph_1$ have nonzero measure?
65768
What is the cardinality of the set of the empty set?
34710
Cardinality of Irrational Numbers
70164
Proof exercise that the cardinal number of a set in $\mathbb R^2$ is $\frak c$
146436
Cardinality of the set of bijective functions on $\mathbb{N}$?
86480
Is the set of all finite sequences of letters of Latin alphabet countable/uncountable? How to prove either?
144787
Show that the set of all infinite subsets of $\mathbb{N}$ has cardinality greater than $\mathbb{N}$
14972
Cardinality of Vitali sets: countably or uncountably infinite?