Proving the countability of a set of polynomials
68139
Show that the set of polynomials with rational coefficients is countable.
6161
The cartesian product $\mathbb{N} \times \mathbb{N}$ is countable
76482
Closure of the set of degree $n$ polynomials with $n$ real roots
14836
A polynomial sequence
156034
sufficient condition for a polynomial to have roots in $[0,1]$
88904
Help with a proof. Countable sets.
138768
Showing that the family of Borel sets is countably generated
128766
Show that the set of functions $\mathbb{N}\to\{0,1\}$ is not countable
36184
Countability of disjoint intervals
71922
Prove Uncountable set minus a countable set is uncountable
134844
Summablity and countability
81682
Proving the algebraic set corresponding to a polynomial is infinite.
52682
Is the power set of the natural numbers countable?
84936
The set of all finite sequences of members of a countable set is also countable
2269
Proof that the real numbers are countable: Help with why this is wrong
128437
How to prove that a finite set is countable
42794
Prove that functions map countable sets to countable sets