Proof for the relationship between Cardinality of Natural numbers and Cardinality of Real Numbers
20281
Easiest way to prove that $2^{\aleph_0} = c$
25788
Prove that $i^i$ is a real number
86421
Proof of the definition of cardinal exponentiation
149673
Cardinality of an infinite union of finite sets
121469
Proof of observations on natural numbers being expressed as differences of squares.
71967
cardinality of the set of $ \varphi: \mathbb N \to \mathbb N$ such that $\varphi$ is an increasing sequence
28942
About Math notation: the set of the first $n$ natural numbers
108748
Why there are real numbers with infinite digits, but no such natural numbers (or another reason why real numbers are uncountable)
158671
Cardinality of a set that consists of all existing cardinalities
144787
Show that the set of all infinite subsets of $\mathbb{N}$ has cardinality greater than $\mathbb{N}$
92639
Prove that the family of open sets in $\mathbb{R}$ has cardinality equal to $2^{\aleph_0}$
156783
$\mathbb R$ has the same cardinality of any interval
148239
natural deduction proof with De Morgan's laws
9158
Proving that a propositional theory of any cardinality has an independent set of axioms
9651
Cardinality of cartesian product of an infinite set with N
116009
Proving that if a set is both open and closed then it is equal to the real numbers
58636
Do the real numbers and the complex numbers have the same cardinality?