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Beez's theorem
In mathematics, Beez's theorem, introduced by Richard Beez in 1875, implies that if n > 3 then an (n – 1)-dimensional hypersurface in Rn cannot be deformed.
References
Laptev, B. L.; Rozenfeld, Boris A.; Markushevich, A. I. (1996), Mathematics of the 19th century, Birkhäuser Verlag, ISBN 978-3-7643-5048-2, MR 1401111
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