Cardinality of a set of non-continuous functions
137883
Cardinality of the set of all (real) discontinuous functions
128350
Number of non-decreasing functions between two finite sets
149673
Cardinality of an infinite union of finite sets
7785
Cardinality of sum-set
79568
Cardinality of the set $D$
38764
bound on the cardinality of the continuum? I hope not
20706
Non-existence of a Surjective Function from a Set to Its Subsets (Cantor's theorem)
77621
Continuity of function mapping connected set to connected set
102972
Cardinality of $\mathbb{R}^\mathbb{R}$ by diagonal argument
33330
Continuous Functions from $\mathbb{R}$ to $\mathbb{Q}$
149095
$f(\mathbb{R}\setminus \mathbb{Q}) \subseteq \mathbb{Q}$ and $f(\mathbb{Q}) \subseteq \mathbb{R}\setminus \mathbb{Q}$ imply that $f$ is not continuous
127233
Cardinality of order types in $\mathbb{N}$
97697
Countable union of sets of cardinality $c$ has cardinality $c$
79974
The cardinality of Lebesgue sets
9651
Cardinality of cartesian product of an infinite set with N
28191
How to show that a set of discontinuous points of an increasing function is at most countable
153495
Continuous function does not map closed set to closed set