If any integer to the power of $x$ is integer, must $x$ be integer?
981
If $n^c\in\mathbb N$ for every $n\in\mathbb N$, then $c$ is a non-negative integer?
144181
Given an arbitrary set $X$, can one always find an element outside $X$?
50110
How to check if a number is a power of 2
40232
What do we mean when we say "Let $x$ be an element of the set $\mathbb{R}$"?
103801
$xT=x$ iff $x=e$ implies that every $g$ may be written as $x^{-1}(xT)$ for some $x\in G$.
2802
If $2^n+1$ is prime, why must $n$ be a power of $2$?
48260
If $R=K[X]/(X^n)$, can represent any element as polynomial with degree $<n$
122612
An integer is a $n$'th power if that holds true for all moduli.
33786
Proof that a certain fraction is always an integer
41779
Is $x/x$ equal to $1$
104917
Is $\sqrt1+\sqrt2+\dots+\sqrt n$ ever an integer?
129163
Showing that every positive integer can be represented in this form
62319
Integer as primitive type
94213
Checking if an input number is an integer
24307
Is $x^x=y$ solvable for $x$?
41486
If $x^n + a_{n-1}x^{n-1} + ... + a_0 = 0$ has a rational root, then such root is an integer
59653
$x^2-y^2=2s$, s cannot be an odd integer