[FOM] Compass and straight edge constructions

Timothy Y. Chow tchow at alum.mit.edu
Thu Sep 29 20:59:19 EDT 2016

Joe Shipman wrote:

> With standard origami folds you can solve cubics and quartics the same 
> as with a marked ruler, but if you allow rolling of cones or cylinders 
> you can n-sect angles for any n, and this get all algebraic numbers with 
> abelian galois group by the Kronecker-Weber theorem.

With so-called origami "multifolds", we can get any algebraic number.



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