If you're in Edinburgh this month, go get some of my #cellularautomata knits from @summerhallarts.bsky.social boutique. #mathematicalknitting #computationalknitting

Hanusa Design jewelry on display in France!

A brass metal ring in the shape of a Mobius strip lying on a slate background

Plenty of Mobius necklaces available in stock that can be sent out in the coming days!

hdsn.us/MN328

Check out hanusadesign.com for a wide selection of mathematical gift ideas!

#mathjewelry #MathSky

A bald white man wearing a patterned blue shirt and a triangular pendant in the foreground. In the background is a red sign that says nysci Science Shop.

I am excited to share my collaboration with the gift shop at the New York Hall of Science (@nysci.bsky.social), an amazing science museum located right here in Queens, NY. As of Fall 2025, Hanusa Design owner Christopher hanusa (@mathzorro.bsky.social) is featured as a local artist in the shop!

Thank you!

The same man standing next to the jewelry on the display stand.

I'm very happy about this collaboration and look forward to building it further over time. And many thanks to @nysci.bsky.social for arranging for these professional pictures with me and my jewelry in the shop.

The same man standing behind a collection of colorful jewelry presented tastefully on a display stand. They are in the gift shop at the New York Hall of Science with plenty of science gift ideas.

Many museum shops are run by a giant conglomerate, but not the nysci Science Shop! Through this collaboration I've worked directly with Sanjay, the retail manager, who curates his store with hand-picked gift ideas. You should visit the museum and then stop by the store to see the wide selection.

Colorful jewelry on jewelry cards held by the artist.

Brightly colored Hanusa Design Jewelry in cello packaging on the display stand.

There is now a wide selection of Hanusa Design jewelry on sale in the @nysci.bsky.social gift shop. Each piece has a mathematical significance, was 3D printed in nylon, and dyed in bright colors. If you're not nearby, you can shop online at shop.nysci.org. #mathjewelry

A bald white man wearing a patterned blue shirt and a triangular pendant in the foreground. In the background is a red sign that says nysci Science Shop.

I am excited to share my collaboration with the gift shop at the New York Hall of Science (@nysci.bsky.social), an amazing science museum located right here in Queens, NY. As of Fall 2025, Hanusa Design owner Christopher hanusa (@mathzorro.bsky.social) is featured as a local artist in the shop!

Thank you!

Trying to support artists this holiday season! I bought a silk scarf from a local artist for my MIL today and just ordered some jewelry from this shop for my math major daughter

A pile of colorful pendants in the shape of a pi inscribed in a circle

Its high-time for pi-time! Check out these mini pi earrings just waiting to be assembled. So cute! So mini! (0.5 in / 12.6mm wide) So many!

Order yours today: hdsn.us/NE200

#MathSky #mathjewelry #geekchic #geekgifts

Two white earrings that look like a star on a gray background

The merkaba has long been a mystic symbol. At its heart is the intersection of two tetrahedra. Here is my take on this classic form, replacing the sharp lines by soft curves.
Merkaba Earrings available now: hdsn.us/NE221

#MathSky #mathjewelry #nylonearrings #3dprinted #merkaba #sacredgeometry

Red earrings made out of three dangling cubes

I know, I know, it's hard to improve on the cube. But hear me out! What if you interlock two wireframe cubes together? Sure, it's crazy. But wait there's more! What if you attach a third one? And you can wear them! On your ears? What?!
hdsn.us/NE210
#MathSky #cubes #nylonjewelry #3dprinted

I definitely wanted the projection to look like K3,3 as I draw it on paper. Then I wanted it to be rotationally symmetric around the z-axis. Last, I wanted it not to self-intersect. That pretty much left me with this sort of embedding. I used splines to make the "3D edges" all bump out similarly.

Blue earrings on a gray background

Forbidden subgraph earrings - wear a theorem on your ears! Kuratowski's theorem says that a graph is planar if and only if it contains neither a K5 nor a K3,3 as a subgraph. Here are those two forbidden subgraphs.
Available at hdsn.us/NE230.
#MathSky #mathjewelry #gomath

It was exciting to choose an embedding :)

☀️☀️☀️☀️ So happy to hear that! 🌞🌞🌞🌞

I always get compliments on my mathy earrings and if you also want to be fabulous, you need to check out @hanusadesign.com

Blue earrings on a gray background

Forbidden subgraph earrings - wear a theorem on your ears! Kuratowski's theorem says that a graph is planar if and only if it contains neither a K5 nor a K3,3 as a subgraph. Here are those two forbidden subgraphs.
Available at hdsn.us/NE230.
#MathSky #mathjewelry #gomath

Thank you!

Thank you!

Woot woot!

Trefoil pendants in rose gold plated brass, brass, and silver on a slate background.

Colorful geometric earrings made up of wireframe cubes arranged in an abstract way

Two small yellow geometric earrings made up of tetrahedra on a dark teal and blue background

Two gold plated hypercubes stacked on top of each other on a slate background.

Hi! I turn mathematical ideas into wearable art.
I design #mathjewelry 💍 using computational software, bringing them to life through a 3D printing process (SLS nylon or lost-wax casting). Free US shipping over $99.
Visit hanusadesign.com to see the full collection.
#MathSky #mathart #smallbusiness

A gray figure on a white background. The form has many lines criss-crossing and represents a four dimensional knight's tour.

Five colorful nylon hypercubes

On Friday at Noon (EDT) I am giving a talk in the New York Combinatorics Seminar. The title is: "Mathematical illustration through a combinatorial lens" in which I share my decade-long journey as a mathematical artist and jewelry maker and how it intertwines with my combinatorics research.

The jewelry on its display stand

Interested onlookers gazing at the jewelry

A bald white man standing next to a stand containing the jewelry.

A white woman with grey hair wearing black clothes and the jewelry next to the same bald white man

The show went great! It was so nice to be able to share the pieces with everyone. Lots of excitement and enthusiasm for the designs. And everyone else's work was amazing!!

Hanusa Design on the runway in the Netherlands!

Five Möbius bands in five different metals on a black slate background

I was fortunate to receive a large order; so I can share with you the five metals I offer at @hanusadesign.com side-by-side!

Top row: silver and brass. Bottom row: rhodium-, rose gold-, and 14k gold-plated brass.

This is my popular Möbius necklace, available at hdsn.us/MN328.

Four earrings arranged in a square. The earrings are made up of tetrahedra but make the shape of a cube.

Day 5 of #MathArtMarch is discovery. What do you get when you build a 3D analog of the Koch snowflake? Start with a tetrahedron and add smaller and smaller tetrahedra to the boundary. Keep going and you get ... a CUBE?!?!? 🧊🧊

Koch Tetrahedron: hdsn.us/ME234
Read more: hdsn.us/read

🧮 #mathjewelry

Two red cylindrical earrings with swirly patterns on a white background.

Six cylindrical earrings with different swirly patterns on a teal background.

#MathArtMarch for 3/4/25 (nice numbers btw!)

"swirly" ... that made me think of my rotini earrings. (pasta ftw!)
Each model swirls to replicate a different mathematical function. From left to right: |x| (x+sin(x)) sawtooth, x^2, x^3, e^x

They're so fun!

hdsn.us/rotini

#MathSky #mathjewelry