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diffgeom.com
Original Math Designs
@diffgeom.com
650 followers 500 following 340 posts
The online shop Differential Geometry, at www.diffgeom.com, run by Andrew D. Hwang.

"Hwang" rhymes with "song" more or less, he/him: Freelance mathematician, mathematical artist (no machine learning), author, difficult to summarize. I block bots
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sgoldstine.bsky.social
#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/...
The catalog photo of Fundamentals of Lace, a knitted wall hanging. The piece is a rectangle of blue knitted lace lashed to wooden dowels at the top and bottom. The fabric has white, yellow, and red beads knitted into the lace. The rectangle is divided into a 3 x 3 grid of different lace designs, and each section has its own pattern of colored beads that mark the symmetries of the design. The white beads, which are always in vertical or horizontal lines, mark the axes of reflection (mirror) symmetries. The yellow beads (also in vertical or horizontal lines) mark the axes of glide reflection symmetries. The red beads, which are slightly larger and more spaced out, mark centers of rotational symmetry. Fundamentals of Lace after blocking and before attaching to dowels, lying flat on a wooden deck. Each of the nine lace designs is made up from smaller lace motifs arranged in four rows and six columns. Disregarding any beads, the motif in the upper left corner of each design is identical, a rectangle with eyelets along one diagonal and half of the other diagonal forming a lowercase lambda. The part of the motif under the lambda is an eyelet mesh, while the regions above and to the left are solid stockinette. The rest of each design consists of the same motif in various orientations, some like the original, some flipped vertically, some flipped horizontally, and some rotated by 180°. Mathematically, the motif is a “fundamental region” for the design; hence, the title of the work. Fundamentals of Lace, pre-blocking. The lace is rumpled and uneven, and the lines of beads are much wobblier than in the finished work. Algebraically, we can prove that there are exactly nine possible symmetry structures for a design in a non-square rectangular grid repeating in two directions. The structures are expressed by the beaded markings: for instance, the middle panel gives an example of a design with no 180° rotational symmetries that has both reflections and glide reflections, and any repeating design that has evenly spaced, parallel symmetry axes that alternate between reflections and glide reflections and nothing else except translations (just sliding the design without twisting or flipping) has the same abstract symmetry structure.
December 29, 2025 at 1:55 AM
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fractalkitty.com
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
Inquiries-Week 6: Beautiful Chords
Introduction In this inquiry, we explore chords, which are lines drawn across circles, using different rules to create various patterns, curves, and shapes. This inquiry will be different from those ...
www.fractalkitty.com
December 31, 2025 at 6:22 AM
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sciencesocks.bsky.social
My final holiday ship-out is TODAY at 2 PM PT / 5 PM ET 🎄✨

For the best chance at Christmas delivery, choose UPS 2-day or faster on in-stock ScienceSocks, acrylic jewelry, ornaments & umbrellas 🎁

🔗 sciencesocks.co

Thank you for your support this year!! 💙

Sharing appreciated 🙏
🔭🐡🧪🎨
JWST holiday ornament in tree with Santa hat
December 19, 2025 at 5:39 PM
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petraschwer.bsky.social
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
Cover of Bessis' Mathematica
December 19, 2025 at 2:28 PM
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vladabotanica.bsky.social
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
December 18, 2025 at 4:04 PM
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elkement.art
Thanks - this gave me an idea what to post in my advent calendar today :)

bsky.app/profile/elke...
elkement.art Elke Stangl (elkement) @elkement.art · 13d
#ArtAdventCalendar Day 18

"Lissajous 345", 2024

3D Lissajous figures and their 2D projections, created with code (no AI).

#MathArt #SciArt
3D Lissajous Figures - x=sin(3t),y=sin(4t),z=sin(5t) - and their 2D projections, as glowing lines on dark background and including the projecting rays. Code-generated art by elkement 2024.
December 18, 2025 at 9:04 PM
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diffgeom.com
Delicate new earrings are in my shop, and would make excellent budget-conscious last-minute gifts for math-loving people in your life! Shipping within the contiguous US normally takes at most 5 business days.

www.diffgeom.com/product/vola...

More in alt text.

#MathSky #MathArt #SciArt #Jewelry
A pair of delicate natural bronze earrings with a symmetric, pretzel-like appearance. From different viewpoints the appearance changes intriguingly and dramatically. The product page has a virtual animation showing the rotating shape. As shown in the product photograph, the shape may vary slightly from the mathematical ideal. Browse all prototypes and other unique pieces: https://www.diffgeom.com/product-category/jewelry/unique-jewelry/ A pair of delicate polished bronze earrings with a symmetric, pretzel-like appearance. From different viewpoints the appearance changes intriguingly and dramatically. The product page has a virtual animation showing the rotating shape. As shown in the product photograph, the shape may vary slightly from the mathematical ideal. Browse all prototypes and other unique pieces: https://www.diffgeom.com/product-category/jewelry/unique-jewelry/ A pair of delicate rhodium-plated brass earrings with a symmetric, pretzel-like appearance. From different viewpoints the appearance changes intriguingly and dramatically. The product page has a virtual animation showing the rotating shape. As shown in the product photograph, the shape may vary slightly from the mathematical ideal. Browse all prototypes and other unique pieces: https://www.diffgeom.com/product-category/jewelry/unique-jewelry/
December 17, 2025 at 5:46 PM
Reposted by Original Math Designs
diffgeom.com
These new earrings are in my shop, and would make excellent budget-conscious last-minute gifts for math-loving people 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
An array of eight pairs of colorful, approximately pyramidal nylon earrings. From above, each looks like an equliateral triangle with one vertex downward. From different viewpoints their appearance changes intriguingly and dramatically. The product page shows views from four directions. All my original nylon earrings are on sale through December: https://www.diffgeom.com/product-category/nylon-wearables/
December 17, 2025 at 12:17 AM
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flyingtrilobite.com
Would love to see the SciArt Feed 🐡 reach 4,000 subscribers by the end of the year.

Pin & Like here:
December 17, 2025 at 4:58 PM
diffgeom.com
Delicate new earrings are in my shop, and would make excellent budget-conscious last-minute gifts for math-loving people in your life! Shipping within the contiguous US normally takes at most 5 business days.

www.diffgeom.com/product/vola...

More in alt text.

#MathSky #MathArt #SciArt #Jewelry
A pair of delicate natural bronze earrings with a symmetric, pretzel-like appearance. From different viewpoints the appearance changes intriguingly and dramatically. The product page has a virtual animation showing the rotating shape. As shown in the product photograph, the shape may vary slightly from the mathematical ideal. Browse all prototypes and other unique pieces: https://www.diffgeom.com/product-category/jewelry/unique-jewelry/ A pair of delicate polished bronze earrings with a symmetric, pretzel-like appearance. From different viewpoints the appearance changes intriguingly and dramatically. The product page has a virtual animation showing the rotating shape. As shown in the product photograph, the shape may vary slightly from the mathematical ideal. Browse all prototypes and other unique pieces: https://www.diffgeom.com/product-category/jewelry/unique-jewelry/ A pair of delicate rhodium-plated brass earrings with a symmetric, pretzel-like appearance. From different viewpoints the appearance changes intriguingly and dramatically. The product page has a virtual animation showing the rotating shape. As shown in the product photograph, the shape may vary slightly from the mathematical ideal. Browse all prototypes and other unique pieces: https://www.diffgeom.com/product-category/jewelry/unique-jewelry/
December 17, 2025 at 5:46 PM
diffgeom.com
These new earrings are in my shop, and would make excellent budget-conscious last-minute gifts for math-loving people 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
An array of eight pairs of colorful, approximately pyramidal nylon earrings. From above, each looks like an equliateral triangle with one vertex downward. From different viewpoints their appearance changes intriguingly and dramatically. The product page shows views from four directions. All my original nylon earrings are on sale through December: https://www.diffgeom.com/product-category/nylon-wearables/
December 17, 2025 at 12:17 AM
Reposted by Original Math Designs
unsolvedmre.bsky.social
For today’s Advanced Topics test I wrote my own
@joeldavidhamkins.bsky.social -style question 😁
#iteachmath #MathSky
December 15, 2025 at 3:03 PM
diffgeom.com
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
A 7-ft potted holiday tree made from a thin, leafless branch of white birch, adorned with a scattering of about 80 small mathematical forms, mostly white, side-lit by low sun against shadowed snow and evergreen trees. A close-up of a yellow nylon "loxodrome sphere" about 1-1/4 in across suspended from a birch twig against an out of focus snowy background.
December 14, 2025 at 1:43 PM
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tainalitwakart.bsky.social
#sciart #plasticpollutioncoalition @HillyerA&AI Arts gallery,
December 11, 2025 at 10:24 PM
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kristinhenry.bsky.social
#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
Kristin (vis.social Admin) (@kristinHenry@vis.social)
Attached: 1 image For today's #DecembArt post, 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. #Ar...
vis.social
December 12, 2025 at 10:33 PM
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sarahmackattack.bsky.social
Looking for an *L.A. based* artist who (against all odds) has time for a poster gig before the end of the year.

It's for a science + art event.

We can offer $500 for the gig.

Dreadfully sorry about the timeline. Link a portfolio if you're interested, I'll delete this post when we found someone.
December 12, 2025 at 11:00 PM
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minouette.bsky.social
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 🧵
My linocut print of mathematician Virginia Ragsdale in lavender with 4 of her topological diagrams from her thesis in pale green
December 13, 2025 at 1:25 PM
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diffgeom.com
Despite the lateness of the season, I expect to announce a new design within the week. Meanwhile, these pendants, and numerous other pieces, are in stock!

This has been a Difficult Year for many reasons. I and other independent sellers are particularly grateful for your support.
#MathArt #SciArt
diffgeom.com Original Math Designs @diffgeom.com · 24d
Orders to the US normally arrive within 3-5 business days.

www.diffgeom.com/product-cate...

#MathSky #MathArt #SciArt #Jewelry
A promotional card reading "Differential Geometry diffgeom.com Original Jewelry Designs with photographs of three pendants. Harmonia is a flower-like knot shape with six petals; Luminoso consists of six linked bands on the surface of an elegantly-asymmetric doughnut; Crescendo is a circular double-band that suggests a breaking wave.
December 10, 2025 at 5:20 PM
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sciencesocks.bsky.social
Friends, my holiday shipping deadline this year is December 15th 🎄✨

Please consider this your reminder to shop your #science and #astronomy gifts on time if you're shopping for the holidays 🎁

🔗 sciencesocks.com

Thank you for shopping small. Sharing appreciated 🙏

🔭🐡🧪🎨
JWST holiday ornament in tree with Santa hat
December 11, 2025 at 10:46 PM
diffgeom.com
A post on Cara mentioned a call by the University of Arizona Lunar and Planetary Laboratory for space-based fine art and data art:
lpl.arizona.edu/art/

The show runs Feb 27-Mar 1, 2026.

#SciArt #SpaceArt
lpl.arizona.edu
December 12, 2025 at 12:38 PM
diffgeom.com
The designs shown and others -- which I warmly invite humans to browse -- are in stock!

www.diffgeom.com/product-cate...

#MathArt #SciArt #Jewelry
December 11, 2025 at 4:50 PM
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aerialembroidery.bsky.social
I've now opened a raffle for this embroidery landscape - direct link below! The listing has full details for the reason and how to enter, the process, etc. This is a vital moment for me so any post engagement/shares will be extremely helpful! victoriaroserichards.co.uk/collection/a... #art
An embroidery hoop containing an embroidered aerial view landscape inspired by vibrant Autumn woods. It depicts trees rich in oranges, reds and golds, winding blue streams, a country lane and wild moorland animals.
December 3, 2025 at 3:18 PM
diffgeom.com
Despite the lateness of the season, I expect to announce a new design within the week. Meanwhile, these pendants, and numerous other pieces, are in stock!

This has been a Difficult Year for many reasons. I and other independent sellers are particularly grateful for your support.
#MathArt #SciArt
diffgeom.com Original Math Designs @diffgeom.com · 24d
Orders to the US normally arrive within 3-5 business days.

www.diffgeom.com/product-cate...

#MathSky #MathArt #SciArt #Jewelry
A promotional card reading "Differential Geometry diffgeom.com Original Jewelry Designs with photographs of three pendants. Harmonia is a flower-like knot shape with six petals; Luminoso consists of six linked bands on the surface of an elegantly-asymmetric doughnut; Crescendo is a circular double-band that suggests a breaking wave.
December 10, 2025 at 5:20 PM
diffgeom.com
And nonetheless, beauty happens

#MathArt #SciArt
A spot of rainbow falls on the upward-sloping struts of a metal mathematical sculpture.
December 9, 2025 at 1:08 PM