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Collapsing Walls Theorem
Igor Pak and Rom Pinchasi
The American Mathematical Monthly
Vol. 119, No. 2 (February 2012), pp. 156-160
Published by: Mathematical Association of America
Stable URL: http://www.jstor.org/stable/10.4169/amer.math.monthly.119.02.156
Page Count: 5
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Abstract Let P ⊂ ℝ3 be a pyramid with the base a convex polygon Q. We show that when other faces are collapsed (rotated around the edges onto the plane spanned by Q), they cover the whole base Q.
Copyright the Mathematical Association of America 2012