530553166 : www.fq.math.ca/Papers1/56-2...

But if you want a large number related, check out the related numbers in this cited article : www.fq.math.ca/Scanned/31-2...

Folding Polyhedral Nets YouTube video by Mathematical Visual Proofs

If you didn’t want to watch how to code folding polyhedral nets in manim and just want to see the resulting animation, here you go:

Folding Polyhedral Nets
youtube.com/shorts/3TOm5...

New month, new process video for the Talking Maths in Public animation generation collaboration. The challenge was to animate polyhedral nets folding up. I show one way in manim. Is this helpful to learn from?

youtu.be/d14hQ0QnWJI

talkingmathsinpublic.uk/animation/

#MathsAnimationTMiP

One of my favorites!

Sequence from @tedgar7.bsky.social!

Entries are light-colored if and only if there are no 'carries' that occur when adding k and n-k in base 6 using the traditional addition algorithm.

You still have two weeks to submit your video for this month's TMiP Animation Generation Collaboration! April's prompt is to create an animation of the net of a polyhedron opening and closing, and show your process. It can be any polyhedron you like!

Ptolemy's Theorem | Proof without Words YouTube video by Mathematical Visual Proofs

Probably the most epic proof of Ptolemy's theorem you will ever see:

youtu.be/heu3ha4X2YA

#math #proof #proofwithoutwords

A Trick Fitch for Two Published in Math Horizons (Vol. 32, No. 4, 2025)

New Math Horizons is out now and I have a short article about taking the Fitch Cheney card trick down to two cards. It’s pretty hard to perform but there is cool math involved :

www.tandfonline.com/eprint/VVSXM...

Last year I made this April math calendar with one “April fool” math concept for each day:

maa.tandfonline.com/doi/epdf/10....

#math #aprilfools

Circle and Sine Wave Manim Build (Talking Maths in Public Animation Generation Collaboration) YouTube video by Mathematical Visual Proofs

Tried a new type of video as part of the Talking Maths in Public animation generation collaboration. The challenge was to animate classic circle and sine wave. I show one way in manim. Is this helpful to learn from?

talkingmathsinpublic.uk/animation/

#MathsAnimationTMiP

youtu.be/H_iW3nEzuyY?...

Leibniz Formula for Pi/4 - A Pi Day Visualization/Dissection YouTube video by Mathematical Visual Proofs

It’s already Pi day in some parts of the world. Here’s a cool visualization of the Madhava-Gregory-Leibniz formula for pi/4 due to Viggo Brun (and written about by Mitsuo Kobayashi). Hope you like it and share with all your math enthusiast friends!

youtu.be/rzZ2JTFVDdw

Leibniz Formula for Pi/4 - A Pi Day Visualization/Dissection YouTube video by Mathematical Visual Proofs

It’s already Pi day in some parts of the world. Here’s a cool visualization of the Madhava-Gregory-Leibniz formula for pi/4 due to Viggo Brun (and written about by Mitsuo Kobayashi). Hope you like it and share with all your math enthusiast friends!

youtu.be/rzZ2JTFVDdw

MAA Focus February/March 2025

This has to be one of my favorite issues of MAA FOCUS. We have a beautiful feature on math and travel. Check it out!

digitaleditions.walsworthprintgroup.com/publication/...

Image of February 2025 issue of Math Horizons showing several Rubik's cubes patterns.

The latest issue of Math Horizons is available to MAA @joinmaa.bsky.social members online.

Maria, Katherine, and Michelle Nogin help us understand why some Rubik's curbs patterns are not possible. Read their article "Permutations in Rubik's Cubes" in the latest issue of Math Horizons.