What is the difference between "n is even if $n^2$ is even" and "n is even only if $n^2$ is even"?
63656
Ways to write 'P => Q'
158308
Proving that if $a,b$ are even, then $\gcd(a,b) = 2 \gcd(a/2, b/2)$
136933
Which $n$ can be expressed as $x^2 − y^2$?
107371
Why round to even integers?
127848
Determine which Fibonacci numbers are even
8815
What is the difference between Θ(n) and O(n)?
100844
How should I understand "$A$ unless $B$"?
2554
Show that if $n>2$, then $(n!)^2>n^n$.
121601
Difference between the use of "a" and "any" in these examples?
16081
What is the difference between rather than and instead of?
17277
Why is Euler's Totient function always even?
5528
Difference between $:=$ and $=$
143543
Prove that $(n - 1)^2 \mid n^k -1$ if and only if $(n - 1) \mid k$
55718
Is zero odd or even?
20755
As a(n) noun vs as only
52823
Difference between "if only" and "only if"
93761
"if", and "elif" chain versus a plain "if" chain