Tom Edgar
tedgar7.bsky.social
Tom Edgar
@tedgar7.bsky.social
Mathematician.
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...
Folding Polyhedral Nets
YouTube video by Mathematical Visual Proofs
youtube.com
April 26, 2025 at 3:25 PM
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
April 24, 2025 at 3:05 PM
Reposted by Tom Edgar
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.
OEIS sequence A254730 by Tom Edgar (February 2015).

(Even terms are drawn as dark hexagons and odd terms are drawn as light hexagons.)
April 8, 2025 at 10:38 PM
Reposted by Tom Edgar
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!
The TMiP Animation Generation Collaboration is a chance to share our methods for creating cool maths animations, so others can be inspired and have the confidence to do so too. Check out this month's prompt and see what people have been up to at talkingmathsinpublic...
April 16, 2025 at 9:06 AM
Probably the most epic proof of Ptolemy's theorem you will ever see:

youtu.be/heu3ha4X2YA

#math #proof #proofwithoutwords
Ptolemy's Theorem | Proof without Words
YouTube video by Mathematical Visual Proofs
youtu.be
April 6, 2025 at 6:41 PM
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...
A Trick Fitch for Two
Published in Math Horizons (Vol. 32, No. 4, 2025)
www.tandfonline.com
April 4, 2025 at 3:14 AM
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
Advertisement - A Month of April Fools
maa.tandfonline.com
April 1, 2025 at 3:10 PM
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?...
Circle and Sine Wave Manim Build (Talking Maths in Public Animation Generation Collaboration)
YouTube video by Mathematical Visual Proofs
youtu.be
March 22, 2025 at 1:07 PM
Reposted by Tom Edgar
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
youtu.be
March 13, 2025 at 2:09 PM
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
youtu.be
March 13, 2025 at 2:09 PM
Reposted by Tom Edgar
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/...
MAA Focus February/March 2025
digitaleditions.walsworthprintgroup.com
February 12, 2025 at 11:26 PM
Reposted by Tom Edgar
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.
February 5, 2025 at 10:44 PM