The Dark Balloon

A weblog by Hao Lian.
A terrible secret guarded by golems.
A note that thanks you for being born, all those years ago.

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The ppd, and the gun.

Given a parallelepiped with fixed surface area and a variable volume, prove that the maximum volume occurs when the parallelepiped is a cube. Using calculus only. A-cha-cha.

[(2008 October 9) .]

Abandon your ideas.

Use Markdown+, but not HTML. In code blocks, beware angle brackets.