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Cardboard Box
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Cardboard Box disapproves of StackExchange's unethical behaviour and bizarre attempts at social engineering.

Despite this, Cardboard Box will still probably answer questions on this site, because it is fun to do so.

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40
Examples of patterns that eventually fail
36
Proof of a formula involving Euler's totient function: $\varphi (mn) = \varphi (m) \varphi (n) \cdot \frac{d}{\varphi (d)}$
23
Every Transitive Permutation Group Has a Fixed Point Free Element
20
Why is it called commutative property?
13
Proving formula involving Euler's totient function

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