Here's a second, geared mechanism that transforms between cube and octahedron forms. Full video at youtu.be/T9BNMLFHXUw

This is a result of our fabulous #illustratingMath trimester at the institute Henri Poincaré in Paris, which ran from January till March this year. Attached is an image of the piece in the #art exhibition at the Maison Poincaré. Definitely give Henry's video a look!

Here's the chance to get into another fabulous #MathArt project with @mathgrrl.com. Attached are some photos of the result of the last project, which was awesome! Subscribe with her to stay up to date on the new endeavor!

Looks like some lovely #MathArt.

Looking forward to see the "cornflaked Rubik's cube" competitions.

Congratulations! Hope to see you in Galway!

Cover art for the May 2026 issue of the Notices of the American Mathematical Society. Here's a link to the issue:

www.ams.org/notices

A fascinating #illustratingMath video. I had seen it, had forgotten the trick, and was as amazed at it as when seeing it the first time. (I'm not a topologist, I guess 😅)

Not only a new Saturday Morning Breakfast Comic, but one #illustratingMath with Terry Tao! Be sure to click the link to read all five pieces (with more than 4 panels each). Also let me know what kind of mathematician you are. I'd say "eccentric professor" for myself 😅

For future reference, you can always send me pictures of unicorns, the official national animal is Scotland 🦄

We are very excited to organize a virtual APNet lunch meeting with award winning outreach expert Dr. @pranoti.bsky.social on "Effective Science Communication Design & Delivery for Your Grant Proposals".

Register to become an APNet member to receive the registration information: ap-net.nl/register

I'm glad to see this coverage of the latest activities of the Delft Young Academy, much in line with what we strive for at the @apnet.bsky.social. Only transparency and fairness in promotion criteria can rebuild trust. #AcademicSky

Polynomial roots.
Made with #Python #NumPy #Matplotlib and @marimo.io

IFS Fractals with Memory and a Little Bit of Non-Linearity.
Made with #Python #NumPy #Matplotlib and
@marimo.io

Only a few days until submissions end for this month's Carnival of Mathematics. Send in any good maths you've seen online this month! aperiodical.com/carnival-of-mathematics

Followers of the Dodecathedral are frequently in quarrels with those of the dual Icosathedral.

Yes, they're both generally doing wonderful #illustratingMath works. It's with checking out their stuff!

Yes! They're just amazing!

A person speaks into a microphone while presenting a slide titled "Illustration, experimentation, and interactivity in algebraic K-theory" by Yuri Sulyma. The slide contains advanced mathematical notation regarding truncated polynomial algebras $\mathbb{F}_p[x]/x^e$ and odd K-theory groups $K_{odd}$. Formulas are displayed in a clean, serif font.

A person points to a slide titled "Regions of influence for $k$." The slide defines $k$ as an imaginary quadratic number field $\mathbb{Q}(\sqrt{D})$ and shows two 3D wireframe diagrams labeled $\mathbb{Q}(i)$ and $\mathbb{Q}(\sqrt{-3})$. The diagrams illustrate "regions of influence" as complex, branching mesh structures rising from a 2D plane.

A person with long hair speaks in front of a slide divided into three columns: "Finite," "Affine," and "Doubly Extended." Each column displays three different mathematical visualizations, ranging from simple 2D polygons and line graphs to incredibly dense, colorful fractals and hyperbolic tilings that resemble complex floral or cellular patterns.

A spherical group photo featuring a large crowd of people gathered in front of the Institut Henri Poincaré in Paris. Each person in the group is smiling and waving or holding their hands up toward the camera lens, creating a sense of shared excitement. They are positioned in an outdoor space between buildings, with a prominent curved red-brick structure in the background displaying the French and European Union flags. The spherical perspective distorts the surrounding trees, parked cars, and neighboring buildings, with bright sunlight creating a lens flare on the left side of the frame.

Closing off the morning, we get to hear a set of eight lightning talks⚡️Pictures show Yuri Sulyma, Sara Varljen, and Zachary Greenberg. One other talk was by Dina Buric about her Arnold Cat Map tool: www.dina-buric.com/cat-map-encr.... Finally, a spherical group picture by @henryseg.bsky.social.(3/3)

A person stands at the front of a classic university lecture hall, gesturing toward a large projection screen. The slide is titled "Interactivity, Fidelity, and Polish: Building Modern Math Illustration" by Cruz Godar. A colorful, iridescent Mandelbrot set fractal is displayed on the right side of the slide. Below the screen is a large, clean blackboard and a wooden desk with water bottles and microphones.

A person wearing a cap and glasses smiles while holding a presentation clicker in a lecture hall. The projected slide behind them is titled "Visualizing Elliptic Curves over Finite Fields" by Steve Trettel. It features a large, lime-green 3D visualization composed of many small spheres arranged in a complex, recursive trefoil-like spiral.

A person gestures toward a screen displaying a $3 \times 4$ grid of twelve pale blue spheres. Each sphere is covered in a unique, intricate red point-cloud pattern, likely representing mathematical data or a specific distribution. To the right of the screen, a list titled "Lightning Order" is written on the blackboard, naming various presenters.

In the morning, we get to hear four talks from Cruz Godar, @stevejtrettel.bsky.social, Jonathan Love, and Claire Burrin. Jonathan spoke about "Sonification in number theory," you can listen to their results here: jonathanlove.info/mathmusic/ (2/3).

A colorful 2D Voronoi diagram arranged in a phyllotactic spiral pattern, mimicking the natural growth found in sunflowers. The polygonal cells are shaded in a pastel palette of blue, green, yellow, and purple. To the right, a text panel explains the mathematical parameterization for $N = 333$ nodes, defining Cartesian coordinates via $r_n = c\sqrt{n}$ and $\theta_n = n\varphi$, utilizing the golden angle $\varphi = \pi(3 - \sqrt{5})$.

An intricate 2D geometric tiling representing an aperiodic Penrose P3 structure. The image is densely packed with small polygonal cells in various pastel colors, creating a complex, non-repeating pattern. A text panel on the right describes the "Cut-and-Project Method," noting that the vertices are generated by mapping a discrete 5-dimensional hypercubic lattice $\mathbb{Z}^5$ onto a 2D plane.

A 3D digital render of a cube composed of numerous interlocking Voronoi cells. The cube features a vivid spectral gradient, transitioning horizontally from red on the left through yellow, green, and blue, to deep purple and magenta on the right. The object is displayed on a neutral gray perspective grid.

A 3D digital render showing a "partial" or "exploded" view of the same Voronoi cube. Many of the internal and external cells have been hidden, revealing the gaps and the complex 3D polyhedral shapes of the remaining colorful cells. The floating cells maintain their original positions, suggesting the ghostly outline of the full cube.

Before looking at today's second day of the third #illustratingMath workshop at the Institut Henri Poincaré, I would like to share some of yesterday's results. Here are two images by @bernatree.bsky.social and @henryseg.bsky.social, respectively, using Voronoi cells for visualization. (1/3)

A group of people are seated at wooden tables arranged in a U-shape within a bright room. One person, wearing a colorful patterned shirt, stands and addresses the group. Several laptops and notebooks are open on the tables, and a French recycling poster is visible on the wall.

Six people are gathered around a circular table in a common area, focused on several small 3D-printed models and sketches. One person stands and gestures toward the objects on the table. A large chalkboard with chalk markings and a white geometric sculpture are visible in the background.

A view from the back of a tiered lecture hall where several people are seated on wooden benches. At the front, a person sits at a desk facing a large projection screen that displays a detailed circular illustration. The chalkboards flanking the screen are filled with mathematical equations.

A group of people are in a casual lounge area with pink and grey modular seating. They are engaged in a discussion while looking at a laptop screen. In the background, a green chalkboard is covered in mathematical formulas, and a wooden slat wall has various papers attached to it.

The afternoon was devoted to hands-on activities. Here are example pictures from a discussion on #illustratingMath in the classroom, a short course on learning how to draw #math, a work group on visualizing the p-adics, and a work group on visualizing ideal class groups. (2/2)

A person stands at the front of a lecture hall next to a large chalkboard and a wooden desk. Behind them, a large screen displays a presentation titled "The power of pictures" by Andrew V. Sutherland, MIT, featuring several mathematical graphs and distributions. They have their hands clasped and are looking toward the audience.

A person stands at a long wooden desk in a lecture hall, looking down at a screen. On the wall behind them, a slide titled "The continuum" shows a sequence of geometric shapes, including aperiodic tiles labeled as "chevron," "hat," and "turtle." A large black chalkboard is positioned below the projection.

A person stands in a lecture hall, gesturing with their hands as they speak. The presentation slide behind them is titled "What Color Should This Pixel Be?" and includes the subtitle "Illustrating Number Theory, March 2026." The slide background features a pattern of thin, radiating orange arcs.

A person stands at the front of a classroom, looking toward a large projection screen. The slide, titled "The Farey triangulation," displays a complex network of lines and fractions representing a mathematical tree. Text on the slide also mentions the Stern-Brocot tree.

Yesterday, we kicked off the third and last #illustratingMath workshop at the Institut Henri Poincaré, dedicated to "Integrating Research and Illustration in Number Theory." In the morning, we heard four great talks. Here are Roice Nelson's visuals: roice3.org/paris2026/. (1/2)

First Shape Found That Can’t Pass Through Itself | Quanta Magazine After more than three centuries, a geometry problem that originated with a royal bet has been solved.

Excited to learn that my Quanta article about the Noperthedron will appear in The Best American Science and Nature Writing! Many thanks to guest editor @xkcd.com + @jaimealyse.bsky.social, Mariner Books, @jordanacep.bsky.social and @quantamagazine.bsky.social
www.quantamagazine.org/first-shape-...

If you're in the UK on June 7th, please help @christianp.mathstodon.xyz.ap.brid.gy with his #illustratingMath project #BeachSpectres.

Join us in building a strong #Network of Assistant Professors in the #Netherlands!

If you are an #AssistantProfessor or equivalent in the Netherlands, we invite you to join APNet, a vibrant community created by and for Assistant Professors across the Netherlands.

ap-net.nl/register/

Cardboard sculpture, centered on a vertex. Legs swirl out from the vertex connections. Connected with white zip ties.

A different view of the sculpture, centered on a vertex.

Cardboard and zip ties.

#mathart

Pi Day is tomorrow!

Celebrate with 31.4% off books across the bookstore for one day only.

Use code PI-DAY26 at checkout.
*Excludes select distributed titles.

#PiDay #MathSky

Browse here: https://ow.ly/tCGH50YtzVB

A brown promotional flyer for "Live from the Institut Henri Poincaré: Pt II," hosted by the Illustrating Math Seminar Online. A circular photo shows the arched brick entrance of the IHP in Paris. The text describes a "show and ask" format where mathematical illustrators share what they have been working on. The event is Friday, March 13, at 9 AM PT / 12 PM ET / 5 PM CET. A QR code and the website illustratingmath.org are included for the Zoom link.

🚨Correction🚨
The talk will be tomorrow, MARCH 13th, at 5 pm Europe!

(Not February and not 6 pm, thanks to some copy-paste errors and the US switching from daylight saving to summer time earlier than Europe, respectively.)

Here's a corrected poster👇See you all there & then.

A promotional flyer for a virtual event titled "Live from the Institut Henri Poincaré: PT II." The top left features a circular photo of the arched brick entrance to the Institut Henri Poincaré in Paris, with the name of the institute engraved in the stone above the door. Event Description: The text states that a group of mathematical illustrators is working at the institute this winter. In this "show and ask" format, a variety of participants will share what they have been working on. Schedule and Logistics: Date: Friday, February 13. Times: 9 AM US Pacific, 12 PM US Eastern, and 6 PM Central Europe. Platform: The talk will be held on Zoom. A QR code is provided in the bottom right corner to join the meeting. Website: illustratingmath.org The footer indicates that the Illustrating Math Seminar Online takes place on the second Friday of every month.

Tomorrow, on Friday, the 13th, join us for the second "Live from the Institut Henri Poincaré" #illustratingMath seminar online. You will get to hear what people have been working on during the current trimester program. We start at 9am Pacific/12pm Easter/6pm EUR. See you then!