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Re:Division By Three (2006) by lisper on Sunday April 27, 2014 @05:11PM (#7656900)
> If 3x = 3y, then x = y. (and that's all)

No, that's not quite all. They prove it 1) even if x and y are infinite and 2) without resorting to the axiom of choice. It is those two things that make it interesting.

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