Are irrational numbers irrational by nature?
44573
Can $\pi$ be rational in some base radix
151876
Is irrational times rational always irrational?
141424
$\log_7 n$ is either an integer or an irrational number
5420
Why doesn't Cantor's diagonal argument also apply to natural numbers?
77129
Density of irrationals
3790
Rational + irrational = always irrational?
9969
Is infinity a real number?
21237
$\sqrt{6}-\sqrt{2}-\sqrt{3}$ is irrational
30411
The closure of the irrational numbers on $\mathbb{R}$
117366
Is there a simple, constructive, 1-1 mapping between the reals and the irrationals?
78287
Prove that if $n$ is not the square of a natural number, then $\sqrt{n}$ is irrational.
101028
Irrational numbers and Borel Sets
98666
Continuity defined for rational and irrational numbers
125812
Is sin(x) necessarily irrational where x is rational?
107105
Is an irrational number odd or even?
4946
Non-existence of irrational numbers?
131634
Prove the irrationality of $0.235711131719...$