What does $2^X$ mean in $2^X:= {\mathcal {P}}(X)$
3101
Meaning of a set in the exponent
134348
When is $(p - 1)! + 1$ a power of $p$?
104602
asymptotic of $x^{x^x} = n$
114346
Why is $a^{-1}$ mod $p$ equal to $a^{p-2}$ mod $p$?
25187
Why $∀x(P(x)→Q)$ is equivalent to $∃xP(x)→Q$
27898
Difference between $\sqrt{x^2}$ and $(\sqrt{x})^2$
58622
Intersection points of $2^x$ and $x^2$
48332
Why does the minimum value of $x^x$ equal $1/e$?
133614
Why is $x^{\log_x n}=n$?
72735
Understanding the proof of a formula for $p^e\Vert n!$
102138
Why does $\sqrt{x^2}$ seem to equal $x$ and not $|x|$ when you multiply the exponents?
110662
Show that $P(\mathbb{N})$ is equivalent to $2^\mathbb{N}$
146432
If $2^{\aleph_0}=\aleph_2$, what is known about $2^{\aleph_1}$?
127205
Explain proof of irreducibility of $x^{p-1} + 2x^{p-2}+ \dots +(p-1)x + p$
113005
What does this notation mean? $f(x) \equiv A$?
43048
When is $2^n \pm 1$ a perfect power
83909
Is $2^{2n} = O(2^n)$?