arXiv: How to crush a milk carton to increase its volume
arxiv.org/abs/math/0607754Posted Feb 17, 2009, 8:31 PM UTC
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arxiv.org
The link title is taken from a paper of V. A. Alexandrov, that is unfortunately only available in Russian (it's cited by this paper).
This paper of Igor Pak's appears in the American Mathematical Monthly no. 5 in 2008, but there is no freely available copy of that paper; hence the preprint.
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Who said mathematicians have no sense of humor?