Torus can be cut into 13 Pieces with 3 Plane Cuts

Theorem

A torus can be cut into as many as $13$ separate pieces by $3$ plane cuts.

Proof

This theorem requires a proof. In particular: Lots of background work needed. You can help $\mathsf{Pr} \infty \mathsf{fWiki}$ by crafting such a proof. To discuss this page in more detail, feel free to use the talk page. When this work has been completed, you may remove this instance of {{ProofWanted}} from the code. If you would welcome a second opinion as to whether your work is correct, add a call to {{Proofread}} the page.

Sources

• 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $13$