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Published at 759 × 242 in The human mug
Double torus with green ring around each "doughnut hole" and a blue ring around the side of each "doughnut hole"

Cutting these four one-dimensional holes on a double torus would give a single piece…

Ashleigh is a PhD student and graduate teaching assistant at the University of Leicester. Her main mathematical interests are in number theory. She is passionate about outreach and inclusion in mathematics, volunteers as a STEM ambassador and is a representative for the Piscopia Initiative.
All articles by Ashleigh

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