--- title: 'The Classification of Donuts with Non-Commutative Geometry' --- ![](https://i.imgur.com/lcG1Pa4.png) ![](https://i.imgur.com/qv8gWsr.png) ![](https://i.imgur.com/xJLTsqb.png) ![](https://i.imgur.com/qyWyEX4.png) ![](https://i.imgur.com/gxlOX8x.png)