Tag Archives: torus

More words about PWW #25: The Chinese Remainder Theorem

Posted on April 5, 2019 by Brent

In a previous post I made images like this: And then in the next post I explained how I made the images: starting in the upper left corner of a grid, put consecutive numbers along a diagonal line, wrapping around … Continue reading →

Posted in modular arithmetic, number theory, posts without words | Tagged , , , , | 3 Comments

A few words about PWW #25

Posted on March 9, 2019 by Brent

In my previous post I made images like this: What’s going on? Well, first, it’s easy to notice that each grid starts with in the upper-left square; is one square down and to the right of , then is one … Continue reading →

Posted in modular arithmetic, number theory, posts without words | Tagged , , , , | 4 Comments

Paper torus with Villarceau circles

Posted on January 3, 2017 by Brent

I made another thing! This is a torus, made from 24 crescent-shaped pieces of paper with slots cut into them so they interlock with each other. I followed these instructions on cutoutfoldup.com. There is also a template with some ideas … Continue reading →

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