Do the irrationals form a group?
138162
Do Irrationals form a group?
35837
How to prove that any (integer)$^{1/n}$ that isn't an integer, is irrational?
15110
About irrational logarithms
102729
Is there an equidissection of a unit square involving irrational coordinates?
25421
Simple or not simple Groups
101028
Irrational numbers and Borel Sets
125812
Is sin(x) necessarily irrational where x is rational?
67031
use contradiction to prove that the square root of $p$ is irrational
139025
Do all Groups have a representation?
3790
Rational + irrational = always irrational?
65895
Irrationality proofs not by contradiction
87410
Are there real numbers that are neither rational nor irrational?
58484
Is the topological product $\Pi \{G_\alpha: \alpha < \kappa\} $ a topological group?
23164
Why are irrational numbers uncountable and rationals countable?
30622
Proving $\sqrt 3$ is irrational.
147363
Is $\large \frac {\pi}{e}$ rational, irrational, or trandescendal?
19076
If a.b.c,d are rationals and x is irrational number, then prove that $\frac{ax+b}{cx+d}$ is usually a irrational number. When do exceptions occur?