Proof that it is unsolvable whether there's an infinity between countable and uncountable?
16869
Why is the Continuum Hypothesis (not) true?
28539
Does any uncountable set contain two disjoint uncountable sets?
2269
Proof that the real numbers are countable: Help with why this is wrong
32774
Finite Cartesian Product of Countable sets is countable?
67295
Please check my proof for $N$ is infinite
81943
How to finish proof that $T$ has an infinite model?
146560
Is there any uncountably infinite set that does not generate the reals?
76240
How is $\epsilon_0$ countable?
21670
Why does an infinite limit not exist?
67066
Proof there is a 1-1 correspondence between an uncountable set and itself minus a countable part of it
68230
The cardinality of a countable union of sets with less than continuum cardinality
44974
Infinite set and countable subsets
63315
Limit to infinity and infinite logarithms?
37398
Proof that$ (a+A)\cap A=\varnothing$ if $A$ is countable
9021
An infinite subset of a countable set is countable
79490
Proving the set of points at which a function diverges to $\infty$ is countable
33157
Proof that an infinite subset of $\mathbb{N}$ is countable