Christopher Hanusa
@mathzorro.bsky.social
Mathematician - Math Educator - Mathematical Artist - and loving it! Visit my @hanusadesign.com profile for #mathjewelry | #mtbos | #mathart | #plotter | #transit
Pinned
Christopher Hanusa
@mathzorro.bsky.social
· Nov 17
This talk was given on September 12 in the New York Combinatorics Seminar. Here's a link to the recording. youtu.be/BX6VkFHwn-g?...
Reposted by Christopher Hanusa
The Hard Times is a parody punk news website and it is consistently one of the funniest things on the Internet.
January 3, 2026 at 8:20 PM
The Hard Times is a parody punk news website and it is consistently one of the funniest things on the Internet.
Great!
Mayor Mamdani on daylighting and other street safety measures:
January 4, 2026 at 1:25 AM
Great!
Reposted by Christopher Hanusa
It’s like Pokémon Go, but for people weirdly obsessed with a short lived EV
🌊 Fisker Ocean, plate T102854C spotted for the 1st time
📈 3.3% ▒▒▒▒▒▒▒▒▒▒ (69 out of 2120)
📅 January 01, 2026 at 11:47 PM
📍 Spotted in Brooklyn, Brooklyn
🙏 Contributed by @AirlineFlyer.net
📈 3.3% ▒▒▒▒▒▒▒▒▒▒ (69 out of 2120)
📅 January 01, 2026 at 11:47 PM
📍 Spotted in Brooklyn, Brooklyn
🙏 Contributed by @AirlineFlyer.net
January 2, 2026 at 10:06 PM
It’s like Pokémon Go, but for people weirdly obsessed with a short lived EV
Reposted by Christopher Hanusa
Perhaps worth remembering that polls about US intervention in Venezuela conducted before today are no longer informative. Expect public opinion to polarise very quickly (dampening any effect on Americans’ views of Trump):
We were lucky enough to have our YouGov/The Economist poll in field when the US bombed Iranian nuclear facilities. You can see the partisan realignment in real time
January 3, 2026 at 12:10 PM
Perhaps worth remembering that polls about US intervention in Venezuela conducted before today are no longer informative. Expect public opinion to polarise very quickly (dampening any effect on Americans’ views of Trump):
Reposted by Christopher Hanusa
Please read this whole thread
THREAD. Every year, I tell the story of Ezell Gilbert. It's the story of one of the most remarkable cases in U.S. history, and you’ve probably never heard of it. The story of what the U.S. government did to him is vital for understanding the current moment we are in.
January 3, 2026 at 12:39 AM
Please read this whole thread
Reposted by Christopher Hanusa
“What if you held a tree long enough for it to grow around your hand?” For a piece called It Will Continue to Grow Except at That Point, Giuseppe Penone fitted a cast of his hand to a growing tree and the tree grew around it for more than a decade. [kottke.org]
It Will Continue to Grow Except at That Point
“What if you held a tree long enough for it to grow around your hand?” For a piece called It Will Continue to Grow Except at That Point, Giuseppe Penone fitted a cast of his hand to a growing tree and the tree grew aro
kottke.org
January 2, 2026 at 4:54 PM
“What if you held a tree long enough for it to grow around your hand?” For a piece called It Will Continue to Grow Except at That Point, Giuseppe Penone fitted a cast of his hand to a growing tree and the tree grew around it for more than a decade. [kottke.org]
Reposted by Christopher Hanusa
Reposted by Christopher Hanusa
went back and grabbed the full video of her intro. absolutely incredible
🇮🇹🍝👩🍳🤌🇮🇹🍝👩🍳🤌🇮🇹🍝👩🍳🤌🇮🇹🍝👩🍳🤌
🇮🇹🍝👩🍳🤌🇮🇹🍝👩🍳🤌🇮🇹🍝👩🍳🤌🇮🇹🍝👩🍳🤌
January 2, 2026 at 2:16 PM
went back and grabbed the full video of her intro. absolutely incredible
🇮🇹🍝👩🍳🤌🇮🇹🍝👩🍳🤌🇮🇹🍝👩🍳🤌🇮🇹🍝👩🍳🤌
🇮🇹🍝👩🍳🤌🇮🇹🍝👩🍳🤌🇮🇹🍝👩🍳🤌🇮🇹🍝👩🍳🤌
Reposted by Christopher Hanusa
Anyone at #JMM2026 interested in starting the year with an #illustratingMath project? Don't worry, @mathgrrl.com has you covered, see information below and go create some #MathArt!
Hey #JMM2026 find me wandering around or at the Monday night Knitting Circle if you want to crochet a square based on a cellular automaton for a math/art/community exhibit www.grannylifecrochet.com
January 2, 2026 at 9:20 AM
Anyone at #JMM2026 interested in starting the year with an #illustratingMath project? Don't worry, @mathgrrl.com has you covered, see information below and go create some #MathArt!
Reposted by Christopher Hanusa
hello EVERYBODY remember to GENUARY !!!
tomorrow starts DAY 1 of GENUARY, the generative art month -- we have prepared 31 unique code based daily prompts for you (specifically for you) (yes you)
#generative #genartclub #genuary2026 #genuary
tomorrow starts DAY 1 of GENUARY, the generative art month -- we have prepared 31 unique code based daily prompts for you (specifically for you) (yes you)
#generative #genartclub #genuary2026 #genuary
December 31, 2025 at 11:47 AM
hello EVERYBODY remember to GENUARY !!!
tomorrow starts DAY 1 of GENUARY, the generative art month -- we have prepared 31 unique code based daily prompts for you (specifically for you) (yes you)
#generative #genartclub #genuary2026 #genuary
tomorrow starts DAY 1 of GENUARY, the generative art month -- we have prepared 31 unique code based daily prompts for you (specifically for you) (yes you)
#generative #genartclub #genuary2026 #genuary
Reposted by Christopher Hanusa
Excited to share the below announcement for our new app at pretext.plus -- author PreTeXt in your web browser, no GitHub required! Join the @mathtech.org Discord chat to grab an invite code: first come, first served!
pretext.plus/projects/80f...
pretext.plus/projects/80f...
January 1, 2026 at 11:20 PM
Excited to share the below announcement for our new app at pretext.plus -- author PreTeXt in your web browser, no GitHub required! Join the @mathtech.org Discord chat to grab an invite code: first come, first served!
pretext.plus/projects/80f...
pretext.plus/projects/80f...
Reposted by Christopher Hanusa
The review has finished but it seems like Play Store doesn't automatically invite testers. So here is the link for registered testers to join from Android: play.google.com/store/apps/d... or from web: play.google.com/apps/testing...
January 1, 2026 at 4:42 PM
The review has finished but it seems like Play Store doesn't automatically invite testers. So here is the link for registered testers to join from Android: play.google.com/store/apps/d... or from web: play.google.com/apps/testing...
Reposted by Christopher Hanusa
It's a new day for NYC. Happy new year, friends and comrades. Let's tax the rich, win childcare for everyone, and build even more organization and governing power for the Left in 2026.
January 1, 2026 at 5:22 AM
It's a new day for NYC. Happy new year, friends and comrades. Let's tax the rich, win childcare for everyone, and build even more organization and governing power for the Left in 2026.
Reposted by Christopher Hanusa
It's pretty hard to follow up to cool number years like (20 + 25)² = 2025, but I hope you have a great start to 2¹¹ - 2·11 = 505 + 506 + 507 + 508 = 2026. Happy new year! 🥂🍾🎉
(Bonus fun fact: 2026 is the number of disconnected 4-regular graphs on 17 vertices, via oeis.org/A033483 🧐)
#mathsky 🧮
(Bonus fun fact: 2026 is the number of disconnected 4-regular graphs on 17 vertices, via oeis.org/A033483 🧐)
#mathsky 🧮
January 1, 2026 at 12:07 AM
It's pretty hard to follow up to cool number years like (20 + 25)² = 2025, but I hope you have a great start to 2¹¹ - 2·11 = 505 + 506 + 507 + 508 = 2026. Happy new year! 🥂🍾🎉
(Bonus fun fact: 2026 is the number of disconnected 4-regular graphs on 17 vertices, via oeis.org/A033483 🧐)
#mathsky 🧮
(Bonus fun fact: 2026 is the number of disconnected 4-regular graphs on 17 vertices, via oeis.org/A033483 🧐)
#mathsky 🧮
Reposted by Christopher Hanusa
Here's how the "Quantum Randomness Hitomezashi" embroidery is going so far. Finished the first 6 rows on the x axis, starting 0,1,1,1,0,0,etc. These positions were generated by the first two pulses from @colorado.edu's quantum randomness beacon. #generativedice
December 30, 2025 at 9:38 AM
Here's how the "Quantum Randomness Hitomezashi" embroidery is going so far. Finished the first 6 rows on the x axis, starting 0,1,1,1,0,0,etc. These positions were generated by the first two pulses from @colorado.edu's quantum randomness beacon. #generativedice
Reposted by Christopher Hanusa
Digit Party just went over 1000 days!
Robert Brignall and I celebrated by redesigning the whole thing. Place digits, match neighbors.
🟧🟧⬜⬜🟥
⬜🟧🟧🟥🟪
⬜⬜🟥🟪🟫
⬛🟥🟫🟫🟫
⬛⬛⬛🟫🟫
day 1001: 146 points 66%
digit.party
Robert Brignall and I celebrated by redesigning the whole thing. Place digits, match neighbors.
🟧🟧⬜⬜🟥
⬜🟧🟧🟥🟪
⬜⬜🟥🟪🟫
⬛🟥🟫🟫🟫
⬛⬛⬛🟫🟫
day 1001: 146 points 66%
digit.party
December 29, 2025 at 1:30 AM
Digit Party just went over 1000 days!
Robert Brignall and I celebrated by redesigning the whole thing. Place digits, match neighbors.
🟧🟧⬜⬜🟥
⬜🟧🟧🟥🟪
⬜⬜🟥🟪🟫
⬛🟥🟫🟫🟫
⬛⬛⬛🟫🟫
day 1001: 146 points 66%
digit.party
Robert Brignall and I celebrated by redesigning the whole thing. Place digits, match neighbors.
🟧🟧⬜⬜🟥
⬜🟧🟧🟥🟪
⬜⬜🟥🟪🟫
⬛🟥🟫🟫🟫
⬛⬛⬛🟫🟫
day 1001: 146 points 66%
digit.party
Reposted by Christopher Hanusa
Cool! The circles in an Apollonian Gasket can all have an equation of the form (n|x|-a)² + (n|y|-b)² = 1, where n is a positive integer, and a & b are non-negative integers < n. www.desmos.com/calculator/6...
#MathSky #iTeachMath
#MathSky #iTeachMath
Apollonian Gasket
www.desmos.com
December 28, 2025 at 9:13 PM
Cool! The circles in an Apollonian Gasket can all have an equation of the form (n|x|-a)² + (n|y|-b)² = 1, where n is a positive integer, and a & b are non-negative integers < n. www.desmos.com/calculator/6...
#MathSky #iTeachMath
#MathSky #iTeachMath
Reposted by Christopher Hanusa
EXCLUSIVE: @zohrankmamdani.bsky.social will be sworn in as mayor on midnight on January 1 inside the old abandoned City Hall subway station, saying that he sees the venue as a symbol for the aims of his upcoming administration.
EXCLUSIVE: Mamdani Will Be Sworn In At Abandoned Original City Hall Subway Station
The mayor-elect will kick off a new era by throwing things back to an older one.
buff.ly
December 29, 2025 at 12:01 PM
EXCLUSIVE: @zohrankmamdani.bsky.social will be sworn in as mayor on midnight on January 1 inside the old abandoned City Hall subway station, saying that he sees the venue as a symbol for the aims of his upcoming administration.
Reposted by Christopher Hanusa
When my father-in-law made another comment about $100k tuition, I made him look up tuition at his undergrad institution, Indiana State Evansville (~$15k before aid if you live at home like he did). And then told him that, like him, most college-goers attend within an hour of home.
I think most researchers and policymakers underestimate how much people really do not understand the difference between college sticker and net price. And the way high prices at a select few influences feelings about all.
December 28, 2025 at 3:59 PM
When my father-in-law made another comment about $100k tuition, I made him look up tuition at his undergrad institution, Indiana State Evansville (~$15k before aid if you live at home like he did). And then told him that, like him, most college-goers attend within an hour of home.
Reposted by Christopher Hanusa
It's Fractal Friday! This is "Billowing Vapor":
"Perhaps the whispers could have been avoided. Were circumstances different, the red haze wouldn't fill the skies, wouldn't drown the stars."
#fractal #fractalart #mathart #digitalart #art
"Perhaps the whispers could have been avoided. Were circumstances different, the red haze wouldn't fill the skies, wouldn't drown the stars."
#fractal #fractalart #mathart #digitalart #art
December 26, 2025 at 8:02 PM
It's Fractal Friday! This is "Billowing Vapor":
"Perhaps the whispers could have been avoided. Were circumstances different, the red haze wouldn't fill the skies, wouldn't drown the stars."
#fractal #fractalart #mathart #digitalart #art
"Perhaps the whispers could have been avoided. Were circumstances different, the red haze wouldn't fill the skies, wouldn't drown the stars."
#fractal #fractalart #mathart #digitalart #art
Reposted by Christopher Hanusa
If most people active in electoral campaigns thought about campaigns the way @greenbackbetter.bsky.social does here, we could run many more campaigns knowing that we would lose most of them in terms of immediate electoral outcomes but still keep building power so that, one day, we win most of them.
1/
Arguments about “misuse of campaign resources” always smuggle in an accounting assumption that rarely gets defended.
Arguments about “misuse of campaign resources” always smuggle in an accounting assumption that rarely gets defended.
It’s good Kamala Harris spent her money campaigning and not doing mutual aid! Generally we need candidates to try to win!
December 27, 2025 at 4:49 AM
If most people active in electoral campaigns thought about campaigns the way @greenbackbetter.bsky.social does here, we could run many more campaigns knowing that we would lose most of them in terms of immediate electoral outcomes but still keep building power so that, one day, we win most of them.
Reposted by Christopher Hanusa
Traveling north late Friday? Might want to change plan.
In addition to ice potential near here, zone of moderate to heavy snow northern Mid-Atlantic to parts of NY/New England. ❄️❄️❄️ Winter storm watch NYC -- half a foot or more forecast there. Details @ cwg.live.
In addition to ice potential near here, zone of moderate to heavy snow northern Mid-Atlantic to parts of NY/New England. ❄️❄️❄️ Winter storm watch NYC -- half a foot or more forecast there. Details @ cwg.live.
December 24, 2025 at 8:48 PM
Traveling north late Friday? Might want to change plan.
In addition to ice potential near here, zone of moderate to heavy snow northern Mid-Atlantic to parts of NY/New England. ❄️❄️❄️ Winter storm watch NYC -- half a foot or more forecast there. Details @ cwg.live.
In addition to ice potential near here, zone of moderate to heavy snow northern Mid-Atlantic to parts of NY/New England. ❄️❄️❄️ Winter storm watch NYC -- half a foot or more forecast there. Details @ cwg.live.
Reposted by Christopher Hanusa
BREAKING: Instacart is ending all price testing on its platform in the wake of this report.
EXCLUSIVE: We found that Instacart is using AI algorithms to charge customers different prices for the same items.
It's not just online. It's in physical grocery stores too.
Our months-long investigation with @consumerreports.org and @groundwork.bsky.social found it could cost families $1200/year.
It's not just online. It's in physical grocery stores too.
Our months-long investigation with @consumerreports.org and @groundwork.bsky.social found it could cost families $1200/year.
We Had 400 People Shop For Groceries. What We Found Will Shock You.
YouTube video by More Perfect Union
www.youtube.com
December 22, 2025 at 3:24 PM
BREAKING: Instacart is ending all price testing on its platform in the wake of this report.
Reposted by Christopher Hanusa
The continued erasing of tenure
goldengatexpress.org/114511/campu...
goldengatexpress.org/114511/campu...
SFSU offers buyouts to all tenure-track and tenured faculty
The Voluntary Separation Incentive Program is a “balancing act,” where there is a stronger incentive for tenured and tenure-track faculty to retire and open up room to hire back lecturer faculty.
goldengatexpress.org
December 23, 2025 at 3:55 AM
The continued erasing of tenure
goldengatexpress.org/114511/campu...
goldengatexpress.org/114511/campu...
Reposted by Christopher Hanusa
You've officially made it to the end of the Fall 2025 semester. ☑
Congratulations! 👏 🥳
Time for a well-earned break. 💤
Congratulations! 👏 🥳
Time for a well-earned break. 💤
December 22, 2025 at 9:02 PM
You've officially made it to the end of the Fall 2025 semester. ☑
Congratulations! 👏 🥳
Time for a well-earned break. 💤
Congratulations! 👏 🥳
Time for a well-earned break. 💤