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

"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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diffgeom.com
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
A gallery of 15 photographs of shiny mathematical pendants and earrings at Differential Geometry.
January 24, 2026 at 3:45 PM
Reposted by Andrew D Hwang
samjshah.bsky.social
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
January 21, 2026 at 11:16 PM
Reposted by Andrew D Hwang
markowenmartin.bsky.social
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
January 16, 2026 at 7:49 PM
Reposted by Andrew D Hwang
kristinhenry.bsky.social
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
Abstract art with pattern that looks a bit like a chemistry diagram with flowers and little fish. A map of north america with blurry dots across it Abstract art inspired by chemistry. The pattern has a lot of concentric circles and straight lines. Abstract art that looks like neurons.
January 13, 2026 at 10:26 PM
Reposted by Andrew D Hwang
sgoldstine.bsky.social
#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 ☺️
My featured-artist display at JMM 2026 in Washington DC. Four of the works are hanging on a zig-zag of beige, custom-cut mats, and the fifth is on three black jewelry stands. All pieces were accepted into one or more juried exhibits at JMM or Bridges in the past decade. The blue knitted wall hanging, second from the left, is the solo piece that was accepted into this year’s exhibition. A closer view of the first two panels of the folded mat backing. The three pieces were 28 inches tall and 14, 28, and 28 inches wide, which is bigger than it sounds when you’re carrying them. On the left is Fundamental Frieze Scroll II from 2018, a tan knitted wall hanging which was the precursor for the new piece to its right. That new piece, The Fundamentals of Lace, is knitted in blue on smaller needles but is both wider and taller than the older work. Both wall hangings are composed of the same fundamental region, a small lace motif in a lambda or Y shape, and both have colored beads embedded in the fabric to mark the symmetries. For more details, go to the following post for the online catalog links. A close up of the rightmost mat panel and the jewelry set. As before, for more details you can follow the catalog links in the following posts. The last mat panel has two knitting wall hangings suspended from pins at the top of the panel. To the left is Float Free, Bumblebee, a wall hanging in two-color mosaic knitting with yellow and black yarn. Like the two pieces in the previous photo, the knitted fabric is rectangular and lashed to dowels at the top and bottom. The fabric is divided into horizontal and vertical strips with different repeating abstract designs. On the right of the mat is Redistribution, a wall hanging that has the overall shape of an hourglass whose top segment is shorter than the bottom segment. The upper portion is fan-shaped, with a network of dark purple stitches over a background of pale green stitches. The lower portion is flared like a trumpet and juts away from the wall, with a network of light purple stitches on a background of dark green. To the right of the folding backdrop is Map Coloring Jewelry Set, the oldest artwork in this display. A bead crocheted necklace with pendant, a bead crocheted bracelet, and bead woven earrings in eight matte colors with gold accents hang on a black necklace form and black bracelet and earring stands. This jewelry set won a prize in the JMM 2015 exhibit, and now and then, I still wear it.
January 11, 2026 at 10:45 PM
Reposted by Andrew D Hwang
johannamath.bsky.social
#MathSky It is now 3 weeks until the AWM/MfA Essay Contest deadline! Students can still find someone in a math career whose gender is underrepresented in math, interview them, and write an essay based on that interview! See below for contest rules:
johannamath.bsky.social Johanna Franklin @johannamath.bsky.social · 21d
#MathSky #JMM2026 It is 4 weeks until Feb. 1, better known as the AWM/MfA Essay Contest deadline! That's plenty of time for a student to interview a mathematician whose gender is underrepresented in math and write an essay about them. Contest rules below:
Student Essay Contest
Student Essay Contest Sponsored by AWM and Math for America To increase awareness of the ongoing contributions to the mathematical sciences by women and to promote gender inclusivity, the Associatio...
awm-math.org
January 11, 2026 at 11:06 PM
diffgeom.com
The same design as earrings:
www.diffgeom.com/product/inti...

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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
Photograph of sterling silver earrings, about 5/8 x 7/8 in, each in a single curve that traces two large overlapping circles and a smaller inner circle, resembling an eye.
January 11, 2026 at 4:00 PM
diffgeom.com
My interpretation of linked rings:
www.diffgeom.com/product/inti...
www.diffgeom.com/product/inti...

#MathSky #MathArt #SciArt #Jewelry
Photograph of Intimo Golden, a shiny 1-3/8 in (35mm) tall gold-plated brass pendant that in a single curve traces two large overlapping circles and a smaller inner circle, resembling an eye. Photograph of Intimo, a shiny 1-3/8 in (35mm) tall rhodium-plated brass pendant that in a single curve traces two large overlapping circles and a smaller inner circle, resembling an eye.
January 9, 2026 at 9:30 PM
Reposted by Andrew D Hwang
kristinhenry.bsky.social
#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
My small sketchbook with sketches of varying detail where I'm figuring out the geometry of placing the feet to make the lizard look like it's walking. A finished drawing is in the background.
January 2, 2026 at 10:26 PM
Reposted by Andrew D Hwang
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
Reposted by Andrew D Hwang
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
Reposted by Andrew D Hwang
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
Reposted by Andrew D Hwang
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
Reposted by Andrew D Hwang
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
Reposted by Andrew D Hwang
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 · Dec 18
#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
Reposted by Andrew D Hwang
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 Andrew D Hwang
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 Andrew D Hwang
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 Andrew D Hwang
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
Reposted by Andrew D Hwang
tainalitwakart.bsky.social
#sciart #plasticpollutioncoalition @HillyerA&AI Arts gallery,
December 11, 2025 at 10:24 PM
Reposted by Andrew D Hwang
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) (@[email protected])
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