Uncountable chain of subsets of $\mathbb N$
91485
Finding an uncountable chain of subsets the integers
154474
Image of countable and uncountable sets
79974
The cardinality of Lebesgue sets
41783
Cardinality of the Cartesian Product of Two Equinumerous Infinite Sets
117133
Is there an infinite countable $\sigma$-algebra on an uncountable set
75019
Infinite Cartesian product of countable sets is uncountable
30587
Uncountable well ordered set in $Z^-$ theory.
149673
Cardinality of an infinite union of finite sets
15438
do all uncountable sets have same cardinality as real numbers?
40937
Is the set of partial order relations over $ \mathbb{N}$ countable?
9651
Cardinality of cartesian product of an infinite set with N
1627
Cartesian product of an arbitrary number of sets
33157
Proof that an infinite subset of $\mathbb{N}$ is countable
101669
Cardinality of the Set of all finite subset of $\mathbb{R}$
155168
Is the collection of finite subsets of $\mathbb{Z}$ countable?
124060
Are these subsets of the powerset P(N) countable?
72213
Can a $N-1$ rectifiable set be partitioned into countably many connected pieces?