Is the $n$th root of a positive real number a function?
110051
Is square root a function?
130149
Computablility of a real number
78294
How does one denote the set of  all positive real numbers?
76977
Prove that $f(n)$ is the nearest integer to $\frac12(1+\sqrt2)^{n+1}$?
18911
Finding real roots of negative numbers (for example, $\sqrt[3]{-8}$)
111076
If $f$ is non-constant and entire, prove that there exists a $z_0 \in C$ such that $f(z_0)$ is a positive real number
116901
Monotonicity of $\frac{n}{\sqrt[n]{(n!)}}$
140409
Prove that $\sqrt{n} > \ln n$
50041
Significance of $\sqrt[n]{a^n} $?!
88790
Positive harmonic function on $\mathbb{R}^n$ is a constant?
155096
If $f(x)=x^{n-1}\log x$, then the $n$-th derivative of $f$ is equals?
158730
Is $\ln(\ln(n))$ irrational for any integer $n>1$?
42251
Limit of non-negative real root of $x^n+x^{n-1}+x-1=0$ as $n \to \infty$
157847
If $x_n \to 0$, show that $\sqrt{x_n} \to 0$
44802
The $n$ complex $n$th roots of a complex number $z$
90892
Is a function increasing if the derivative is positive except at one point of an interval?
81778
If $m|n$ and $a$ is a primitive root of $n$, show that $a$ is a primitive root of $m$ (understanding a tip)