Day ☀️♥️

Luminoso is a 1-1/2 inch (40mm) rhodium-plated brass pendant in the shape of a cyclide banded by "diagonal" circles. I have a limited number in stock, and would be delighted to find new happy homes for them! www.diffgeom.com/product/lumi... #MathArt #SciArt #Jewelry

Our International Day of Mathematics events includes 2 special magic shows by Tadashi Tokieda at the Chau Chak Wing Museum on Sat 14 & Sun 15 March 12:30 pm 'A magic show' will be for both curious children 🧒 & seasoned scientists alike! 🪄👩‍🔬 🎩 🧮 events.humanitix.com/a-magic-show... #MathSky

Harmonia is a 1-3/8 inch (35mm) 18K gold-plated brass pendant in the shape of a torus knot. I have a few left in stock, and would be delighted to find new happy homes for them! www.diffgeom.com/product/harm... More about the math: www.diffgeom.com/blogs/about-... #MathArt #SciArt #Jewelry

Looks like my coloring pages are getting popular on Pinterest again. If you like my Procedural Art coloring pages, inspired by Chemistry and Physics, please buy them from ME instead of someone who stole them from me. www.patreon.com/posts/858020... #SciArt #art #Coloring #ArtForSale

Luminoso is a 1-1/2 inch (40mm) rhodium-plated brass pendant in the shape of a cyclide banded by "diagonal" circles. I have a limited number in stock, and would be delighted to find new happy homes for them! www.diffgeom.com/product/lumi... #MathArt #SciArt #Jewelry

A simple interactive program for drawing on a torus, written in response to a math.stackexchange question. Mathematically, we see the flat plane as a conformal universal cover of a circular torus. Read more: www.diffgeom.com/blogs/free-o... #MathSky #ITeachmath

A shipment of postcards arrived today. Not yet decided whether to put them in the shop (as a wish-you-were-here collection after getting other designs printed), or to use them for promotion. If you're willing to comment: Do you ever send postcards and/or greeting cards? #MathSky #MathArt #SciArt

I have a thing for round spheres, not least because 1. extremal Kähler metric, and 2. isometrically embeds in real 3-space. This fetching (if I may say so) digital image arose unexpectedly in January 2026. www.diffgeom.com/product/roll... www.diffgeom.com/product/canv... #MathSky #MathArt #SciArt

Over my years in academia, I wrote or helped create a variety of free online mathematical materials. Phosphene is a meditative geometric solitaire that runs in a web browser. I hope you and your students enjoy the software! Read more: www.diffgeom.com/blogs/free-o... #MathArt #MathSky #ITeachmath

Probably ought to have bleeted this poster image a week or two back.... 🤔 www.diffgeom.com/product/roll... #MathSky #MathArt #SciArt

Over my years in academia, I helped create a variety of free online mathematical materials. Pirouette is a Spirograph clone that runs in a web browser. I hope you and your students enjoy the software! Read more: www.diffgeom.com/blogs/free-o... #MathArt #MathSky #ITeachmath

Work tasks today included thinking about a magic trick and Catalan numbers at the same time — living the dream!

Any of these delicate earrings would make a fine treat for a math-loving someone in your life. All my jewelry is 15% off with code Bsky26 through Feb 14. Shipping to the US normally takes at most 5 business days. www.diffgeom.com/product/vola... More in alt text. #MathSky #MathArt #SciArt #Jewelry

Through Feb 14, all my nylon earring designs are 15% off with checkout code Bsky26. Orders to the US that ship Monday should arrive comfortably before the 14th. Anemone is a stylized representation of the complex 2/7-power. www.diffgeom.com/product-cate... #MathArt #SciArt #Jewelry #3DPrinting

New post on Fractal Kitty: www.fractalkitty.com/filtering-sn... #mathart #pascalsTriangle #binomialExpansion #mtbos #snowflakes #iteachmath

Copies of "An Invitation to Real Analysis" arrived today. (The book came out last September.) If you're evaluating books for an introductory real analysis course, I'm grateful for your consideration. www.diffgeom.com/blogs/around... www.routledge.com/An-Invitatio... #MathSky

Through February 14, use the code Bsky26 at checkout for 15% off all my in-stock nylon earring designs. Shipping within the contiguous US is free, and normally takes no more than 5 business days. www.diffgeom.com/product/vola... www.diffgeom.com/product-cate... #MathArt #SciArt #Jewelry

"Anemone" is a shapely motif inspired by complex rational power functions. The sterling silver pendant shown has exponent 2/7. I still have one in stock: www.diffgeom.com/product/anem... Browse all: www.diffgeom.com/product-cate... #MathSky #MathArt #SciArt #Jewelry

Project update: Tanya and I have been writing up the results of this project and we've realized that all of the knots in this class of patterns are at most 6 "tangle moves" from each other and at most three tangle moves from what we're calling the "great-great-granny knot" (see alt text).

For #PrinterSolstice2526 prompt expression: my #linocut of Olga Ladyzhenskaya (1922-2004), 🧪🐡👩🏼‍🔬🎢🧮 #histsci a #mathematician who overcame personal tragedy, faced Soviet totalitarianism & the catastrophic political upheaval of the 20th century to make a huge impact on math, making important 🧵

A pair of these colorful earrings would make a fine budget-conscious Valentine's Day treat for a math-loving person in your life. Shipping within the contiguous US normally takes no more than 5 business days. www.diffgeom.com/product/vola... More in alt text. #MathSky #MathArt #SciArt #Jewelry

🌿 White Spiral Planter 🐚 Handmade 3D printed pot in matte white. Modern, minimalist, sculptural design. Fits indoor plants, succulents, or decorative use. With or without drainage hole. 🛒 etsy.com/es/listing/4430718751 #3DPrinted #Planter #Minimalist #HomeDecor #Succulents #Handmade #EcoFriendly

I design and sell mathematically-accurate jewelry inspired by differential and algebraic geometry, and topology: www.diffgeom.com/product-cate... #MathSky #MathArt #SciArt #Jewelry #3DPrinting

Day 1 (of 7) of the math art class I’m leading is in the books. We have 15 kids (9th and 10th graders). It’s exhausting! But I think it went well! Kids built a George Hart Sculpture (actually we made two of them!) and we learned about V-E+F=2. #MathArt #mtbos

My wife Dr. Jennifer Quinn is more than a mathematician and math museum director. She is an artist! Here is her #LuxPortrait of Einstein, painted with luminous bacteria on a Petri dish. Such talent! #DontFearTheMicrobe #LuxArt @univpugetsound @microbe.tv @ASMicrobiology

Ah! I see it's #PortfolioDay! I'm an artist working with code, data, mixed media, and ink on watercolor paper. Much of my inspiration comes from Science, Math, and Nature. #SciArt #CreativeCoding #art

#mathart #mathknitting #JMM2026 This year, the math art exhibition at the Joint Mathematics Meetings invited me to be a featured artist, giving me the chance to assemble this mini-retrospective of my knitted and beaded work. Links to the catalog entries are in the following posts. 🧶 #knitsky ☺️

The same design as earrings: www.diffgeom.com/product/inti... <> My online shop will be closed the week of January 19. I expect to re-open the week of January 26. #MathSky #MathArt #SciArt #Jewelry

My interpretation of linked rings: www.diffgeom.com/product/inti... www.diffgeom.com/product/inti... #MathSky #MathArt #SciArt #Jewelry

#Genuary 2026 Day 2: Twelve principles of animation. I'm taking inspiration from the example of how horses run, with body carrying through. But with lizards. I wrote a bit more about it: www.patreon.com/posts/147034... #Genuary2026 #Genuary2 #ink #drawing #art #SciArt

#ShowMeYourKnits #knitterschoice Fundamentals of Lace, 2025: the newest #mathart I’m exhibiting at the Joint Math Meetings next week. Details (like the allusion in the name) are through the link and in the alt text. 🧶 #knitsky #mathknitting #symmetries gallery.bridgesmathart.org/exhibitions/...

Finished a post today on chords. It would be really easy to keep going and make a Monte Carlo for random chords, rotations of connected shapes, moire strings, shadow art with strings, etc. www.fractalkitty.com/inquiries-we... #mtbos #mathart #stringart #decemberAdventure #indieweb

In case you are still trying to find a present for yourself or a loved one who would like to hear more about what we mathematicians do and how so.... I can only recommend Bessis' book Mathematica. What a wonderful read. I could highlight every other sentence. #math #maths #mathsky

Final touches on my pine cone drawing 🌲✨ I love seeing every tiny scale come to life — so calming to focus on these little details of nature. #botanicaldrawing #pineconedrawing #natureart #sketchbookart #slowart

For today’s Advanced Topics test I wrote my own @joeldavidhamkins.bsky.social -style question 😁 #iteachmath #MathSky

Over the course of 2022-23, I accumulated several dozen 3D-printed (selective laser sintered nylon) prototypes for jewelry. Here they are as ornaments for a holiday tree in anticipation of the solstice. #MathSky #MathArt #SciArt

#sciart #plasticpollutioncoalition @HillyerA&AI Arts gallery,

#Day12 I'm sharing a piece inspired by quilting and chemistry. I created this with a particle system and let the code run overnight to render the image. vis.social/@kristinHenr... #ArtAdventCalendar #SciArt #Quilting #art #CreativeCoding #GenerativeArt #ProceduralArt

Bonus #artAdventCalendar: Happy birthday to #mathematician Virginia Ragsdale (1870-1945). 🧪🐡👩🏼‍🔬🧮 #histsci The Ragsdale conjecture, made in her 1906 dissertation, is amongst the earliest and most famous on the #topology of real & algebraic curves, which stimulated a lot of 20th century research & was 🧵

And nonetheless, beauty happens #MathArt #SciArt

For anyone who needs a contour map, for a bit of light relief. Here is a picture of watermelon virus. #mathsky #mathsinthewild

Supporting independent artists, craftspeople, and designers is an affirmation of humanity on multiple levels. A page of links to two dozen math-y independent shops: www.diffgeom.org/misc/math_sh... #MathSky #MathArt #SciArt

Crescendo, named for its resemblance to a breaking wave, depicts the orientable double cover of a Möbius band. #MathSky #MathArt #SciArt #Jewelry

🌟🌟🌟🌟🌟 Five stars for @elkement's evocative, hand-drawn ellipsoid designs: beautifully printed, speedily delivered, in daily use! Check out her online shop store.elkement.art/en-eur and those of other independent math-y artists and designers! www.diffgeom.org/misc/math_sh... #MathArt #SciArt

I design and sell mathematically-accurate jewelry inspired by differential and algebraic geometry, and topology, and invite you to browse! www.diffgeom.com/product-cate... #MathSky #MathArt #Jewelry #3DPrinting

Times are hard for small businesses. Please support independent shops, artists, and craftsfolk! For mathematical jewelry, toys, T-shirts, and posters, here are two dozen independent online shops, including mine: www.diffgeom.org/misc/math_sh... #MathSky #MathArt #SciArt #Jewelry #SmallBusiness

Looks like #plotparty postcards have landed in mailboxes! Read my new blog post about the cards I designed.

Daina Taimina, a Cornell University mathematician uses crochet to demonstrate Hyperbolic Geometry #womensart