The irrationality of the square root of 2
65895
Irrationality proofs not by contradiction
158066
Prove $2^{1/3}$ is irrational.
107105
Is an irrational number odd or even?
131634
Prove the irrationality of $0.235711131719...$
30105
Multiples of an irrational number forming a dense subset
67605
Different proof that $\sqrt{2}$ is irrational
127830
proof that $\sqrt(2)$ is irrational / why is the fraction irreducible
134377
The minimum number of digits after the floating-point, which uniquely identify every irrational square root
142768
Approximation of $\sqrt{2}$
11069
Deciding whether $2^{\sqrt2}$ is irrational/transcendental
87596
Is $\sum_{p}\frac{1}{p^{2}}$ irrational?
75204
Irrationality $\sqrt{2}$ with ideal
2926
The contradiction method used to prove that the square root of a prime is irrational
101028
Irrational numbers and Borel Sets
7500
$\arctan$ of a square root as a rational multiple of $\pi$
59391
$p,q,r$ primes, $\sqrt{p}+\sqrt{q}+\sqrt{r}$ is irrational.
31744
Proving that there is an irrational number between any two unequal rational numbers.