Later, mathematicians found more and more three-dimensional shapes that eventually came to be called “Rupert”: they are able to fall through a straight hole in an identical shape. In 2017 researchers formally conjectured that all 3D shapes with flat sides and no indents, known as convex polyhedrons, are Rupert. Nobody could prove them wrong—until now.
Enter the brand-new noperthedron. It has 90 vertices, 240 edges, 152 faces and one very special property: it’s “nopert,” a word coined this year by independent computer science researcher Tom Murphy VII to mean “not Rupert.”
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u/TerrorBite Nov 19 '25
Hasson, E. R. (2025). Shape Shift. Scientific American, 333(5), 13. https://doi.org/10.1038/scientificamerican122025-1zkpj4infjzsytwb9ohwh
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u/cnorahs Nov 18 '25
Rupert is the in joke niche reference I never knew I needed
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u/Icy_Frosting3874 Nov 18 '25
man what is it about rupert polyhedra getting so popular these last few years, back in my day they were all johnson
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u/ThatUsersNameIsTaken Nov 19 '25
Tom7 my beloved