A forum for discussing and organizing recreational softball and baseball games and leagues in the greater Halifax area.
Did you know it's possible to cut a hole in a cube such that an identical cube can fit inside it?
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Did you know it's possible to cut a hole in a cube such that an identical cube can fit inside it? Really! It's called "Rupert's Property." *All Platonic solids are Rupert!* Except one new shape, which *cannot* fit inside itself. This eldritch polygon is called a Noperthedron!
https://arxiv.org/pdf/2508.18475
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If you'd like an essay-formatted version of this thread to read or share, here's a link to it on pluralistic.net, my surveillance-free, ad-free, tracker-free blog:
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