Mathematicians Make Surprising Breakthrough in 3D Geometry with ‘Noperthedron’ www.scientificamerican.com/article/math...
This New Shape Breaks an ‘Unbreakable’ 3D Geometry Rule
The noperthedron has a surprising property—which disproves a long-standing conjecture
www.scientificamerican.com
October 28, 2025 at 12:17 PM
Mathematicians Make Surprising Breakthrough in 3D Geometry with ‘Noperthedron’ www.scientificamerican.com/article/math...
August 29, 2025 at 8:28 PM
August 30, 2025 at 2:47 AM
This is the Noperthedron. A portmanteau of “nope” and “Rupert,” it is the only known shape that does not have a trait called Rupert’s property. No matter how you bore a straight tunnel through it, a second Noperthedron cannot fit through. www.quantamagazine.org/first-shape-...
March 24, 2026 at 3:46 PM
This is the Noperthedron. A portmanteau of “nope” and “Rupert,” it is the only known shape that does not have a trait called Rupert’s property. No matter how you bore a straight tunnel through it, a second Noperthedron cannot fit through. www.quantamagazine.org/first-shape-...
The noperthedron has a surprising property—which disproves a long-standing conjecture
This New Shape Breaks an ‘Unbreakable’ 3D Geometry Rule
The noperthedron has a surprising property—which disproves a long-standing conjecture
www.scientificamerican.com
October 28, 2025 at 12:30 PM
The noperthedron has a surprising property—which disproves a long-standing conjecture
It's called a noperthedron because it says "nope" when asked if it can pass through itself.
October 24, 2025 at 6:13 PM
It's called a noperthedron because it says "nope" when asked if it can pass through itself.
I just wanted yall to know theres a shape called the Noperthedron and it looks like this:
November 22, 2025 at 12:24 AM
I just wanted yall to know theres a shape called the Noperthedron and it looks like this:
This is the Noperthedron. A portmanteau of “nope” and “Rupert,” it is the only known shape that does not have a trait called Rupert’s property. No matter how you bore a straight tunnel through it, a second Noperthedron cannot fit through. www.quantamagazine.org/first-shape-...
October 25, 2025 at 12:45 PM
This is the Noperthedron. A portmanteau of “nope” and “Rupert,” it is the only known shape that does not have a trait called Rupert’s property. No matter how you bore a straight tunnel through it, a second Noperthedron cannot fit through. www.quantamagazine.org/first-shape-...
The noperthedron is the shape we all need for 2026.
December 24, 2025 at 3:05 PM
The noperthedron is the shape we all need for 2026.
Funny you should ask
October 24, 2025 at 11:58 PM
Funny you should ask
Who among us wouldn’t have also named it Noperthedron?
September 2, 2025 at 11:21 PM
Who among us wouldn’t have also named it Noperthedron?
🚨new shape just dropped🚨 (by @dodecalemma.bsky.social with graphics by me) www.scientificamerican.com/article/math...
This New Shape Breaks an ‘Unbreakable’ 3D Geometry Rule
The noperthedron has a surprising property—which disproves a long-standing conjecture
www.scientificamerican.com
October 29, 2025 at 4:00 PM
🚨new shape just dropped🚨 (by @dodecalemma.bsky.social with graphics by me) www.scientificamerican.com/article/math...
"Noperthedron (after “Nopert,” a coinage by Murphy that combines “Rupert” and “nope")."
October 26, 2025 at 8:46 PM
"Noperthedron (after “Nopert,” a coinage by Murphy that combines “Rupert” and “nope")."
Like trying to put a noperthedron in a noperthedron shaped hole?
October 24, 2025 at 6:14 PM
Like trying to put a noperthedron in a noperthedron shaped hole?
Jakob Steininger and Sergey Yurkevich have been friends since they participated together as teenagers in mathematics Olympiad competitions. Recently, the pair discovered the Noperthedron, the first known convex polyhedron that cannot pass through itself. www.quantamagazine.org/first-shape-...
November 11, 2025 at 9:04 PM
Jakob Steininger and Sergey Yurkevich have been friends since they participated together as teenagers in mathematics Olympiad competitions. Recently, the pair discovered the Noperthedron, the first known convex polyhedron that cannot pass through itself. www.quantamagazine.org/first-shape-...
I always enjoy @ericaklarreich.bsky.social’s math pieces. This is what a Noperthedron looks like:
October 24, 2025 at 6:48 PM
I always enjoy @ericaklarreich.bsky.social’s math pieces. This is what a Noperthedron looks like:
Do you need a holiday gift for that mathematician in your life? Get them a Noperthedron vase!!!
Mathematicians Make Surprising Breakthrough in 3D Geometry with ‘Noperthedron’ www.scientificamerican.com/article/math...
This New Shape Breaks an ‘Unbreakable’ 3D Geometry Rule
The noperthedron has a surprising property—which disproves a long-standing conjecture
www.scientificamerican.com
October 28, 2025 at 12:22 PM
Do you need a holiday gift for that mathematician in your life? Get them a Noperthedron vase!!!
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-...
www.quantamagazine.org/first-shape-...
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.
www.quantamagazine.org
March 20, 2026 at 3:54 PM
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-...
www.quantamagazine.org/first-shape-...
this is so cute. maybe i should go as a noperthedron for halloween somehow
October 25, 2025 at 11:20 PM
this is so cute. maybe i should go as a noperthedron for halloween somehow
This is cool for many reasons. But also because it lets them write sentences like "We also find a polyhedron that is Rupert but not locally Rupert." And also name a shape the Noperthedron (as in not-Rupert).
The conjecture that every convex polyhedron is Rupert is settled in the negative! The convex body in the image cannot pass straight through a hole inside itself.
arxiv.org/abs/2508.18475
#Mathematics #Geometry #MathSky
arxiv.org/abs/2508.18475
#Mathematics #Geometry #MathSky
August 27, 2025 at 7:31 PM
This is cool for many reasons. But also because it lets them write sentences like "We also find a polyhedron that is Rupert but not locally Rupert." And also name a shape the Noperthedron (as in not-Rupert).
Here’s a picture of the actual noperthedron, since frustratingly the article title image shows a different shape not the new one
October 25, 2025 at 2:59 AM
Here’s a picture of the actual noperthedron, since frustratingly the article title image shows a different shape not the new one
Next round, understood!
noperthedron. hmmm...
no-perth-edron.
noper-the-dron.
no-pert-hedron.
noperthedron. hmmm...
no-perth-edron.
noper-the-dron.
no-pert-hedron.
September 18, 2026 at 3:49 AM
Next round, understood!
noperthedron. hmmm...
no-perth-edron.
noper-the-dron.
no-pert-hedron.
noperthedron. hmmm...
no-perth-edron.
noper-the-dron.
no-pert-hedron.
I want a noperthedron flower pot.
November 11, 2025 at 9:42 PM
I want a noperthedron flower pot.