Noperthedron

4 Preliminaries

TODO: This whole chapter needs organization, it’s just a grab bag of miscellaneous results for now.

4.1 Rupert Sets

Theorem 15 Rupert Polyhedron iff Rupert Set
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The following are equivalent:

  • The convex polyhedron with vertex set \(v\) is Rupert.

  • The convex closure of \(v\) is a Rupert set.

Proof

TODO: import this from the other repo

4.2 Poses

TODO

Theorem 16

Given a pose with zero offset, there exists a 5-parameter pose that is equivalent to it.

Proof

By putting the pose into a canonical form as a Z rotation followed by a Y followed by a Z.

4.3 Pointsymmetry and Rupertness

Theorem 17
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If a set is point symmetric and convex, then it being Rupert implies it being purely rotationally Rupert.

Proof

TODO: informalize proof