The set of all bijections from N to N is infinite, but not countable
78523
Is symmetric group on natural numbers countable?
67064
Uncountable minus countable set is uncountable
119549
Prove the even integers are countable (by explicitly giving a bijection $\mathbb{N} \to E$)
2403
Can a countable set contain uncountably many infinite subsets such that the intersection of any two such distinct subsets is finite?
108922
Cardinality and infinite sets: naturals, integers, rationals, bijections
20085
What's the cardinality of all sequences with coefficients in an infinite set?
66301
The cardinality of the set of countably infinite subsets of an infinite set
9651
Cardinality of cartesian product of an infinite set with N
156335
Proving Power Set of $\mathbb N$ is Uncountable
84936
The set of all finite sequences of members of a countable set is also countable
139078
Infinite partition of $\mathbb N$ by infinite subsets
52429
Explicit countable elementary extension of $\mathbb{N}$
44974
Infinite set and countable subsets
155777
Show that infinite Cartesian product is uncountable
20706
Non-existence of a Surjective Function from a Set to Its Subsets (Cantor's theorem)
124847
Is the set of surjective functions from $\mathbb{N}$ to $\mathbb{N}$ uncountable?
64193
Cardinality of Infinite Symmetric group