# Torus can be cut into 13 Pieces with 3 Plane Cuts

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## 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): $13$