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Craig S. Kaplan

@isohedral.ca
430 followers 146 following 70 posts

Mathematics, Computer Science, Art, Design, Music, Soup, Pedantry. he/him/anything Mainly over at @csk@mathstodon.xyz, but happy to follow people here and might check in occasionally.

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Reposted by Craig S. Kaplan
David Cooper @davidbcooper.bsky.social · 21/09/2026
Starting my day making some art.
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Glennyrodge @glennyrodge.bsky.social · 20/09/2026
History FACT: Henry VIII's sixth wife did not 'survive'. She's definitely dead
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Danny Fearns @dannyfearns.bsky.social · 16/09/2026
I don't follow Formula One, but good on them for using subtitles for the hard of hearing… 
F1 track with numerous Zoom signs on the advertising billboards
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Shriram Krishnamurthi @shriram.bsky.social · 13/09/2026
I've been crystalizing some advice for first-year college students: "Advice to the New College Student in the AI Era". Thesis: "the purpose of going to college is to emerge as close to middle-aged as possible". docs.google.com/document/d/e...
docs.google.com
Advice to the New College Student in the AI Era
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kat 🌻 @kataclyst.bsky.social · 10/09/2026
cs.uwaterloo.ca/news/ian-gol...
cs.uwaterloo.ca
Ian Goldberg appointed Fellow of the Royal Society of Canada | Cheriton School of Computer Science | University of Waterloo
An article detailing the achievements that led to Professor Ian Goldberg being named a 2026 Fellow of the Royal Society of Canada
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knityak @knityak.bsky.social · 29/08/2026
mandelbrot sweaters launching soon. now in fancy custom dithered four color knit designs and our classic two colors from years ago. pixel native knit sweaters. mathy and delicious. #knit #math #dithered #algorithmicallygenerated #mathfashion #fractal #mathart #cozycomputation
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Eric Lippert @ericlippert.com · 04/09/2026
After many delays, my book is finally done! Print copies ship on September 29th, and the e-book is HALF OFF at www.manning.com/books/fabulo... from now through Labor Day, WHAT A FABULOUS DEAL! Thanks to everyone who supported this project; I appreciate you all so much.
manning.com
Fabulous Adventures in Data Structures and Algorithms - Eric Lippert
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Gautam Kamath @gautamkamath.com · 31/08/2026
To spell some of it out: - The colleagues are kind & brilliant - The students are exceptional, 2nd to no other school - Minimal BS in the way of research Cons: - cold - canadian geese are scary (but cute) If you want to do world-class research, look no further than UWaterloo CS
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MapQuest @mapquest.com · 27/08/2026
We’re not changing it.
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Truttess @truttess.bsky.social · 25/08/2026
If Lake Ontario becomes Lake America, the memory device HOMES will be changed to SHAME. Seems appropriate.
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Dr. Martin Skrodzki @msmathcomp.bsky.social · 05/08/2026
We're kicking off this year's Bridges #Mathart conference with warm welcomes by the former president of the Bridges organization, George Hart, the newly elected president, Craig Kaplan, local organizer Rachel Quinlan, and head of the #math school, Cathal Seoighe. #MathArt
Former president George Hart in front of a screen showing the Bridges Galway 2026 logo.Newly elected president Craig Kaplan in front of a screen showing the Bridges Galway 2026 logo.Local organizer Rachel Quinlan at a podium.Head of the Galway math school, Cathal Seoighe, at a podium.
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Gizem Karaali 🧿 @gizem-karaali.bsky.social · 01/08/2026
Hi Blue Sky! I edit the Journal of Humanistic Mathematics. We publish articles, essays, #fiction & #poetry on doing, teaching & living #mathematics. We've had more than 900K full-text downloads of our content - why not check us out? scholarship.claremont.edu/jhm/ #math #openaccess #mathart #mathjoy
scholarship.claremont.edu
Journal of Humanistic Mathematics - an online-only, open access, peer reviewed journal | Current Journals | Claremont Colleges
Journal of Humanistic Mathematics - an online-only, open access, peer reviewed journal published by the Claremont Colleges Library.
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Daniel Fedor @dcfedor.bsky.social · 24/07/2026
Blue Bottle Games, as a policy, does not use generative AI. It's something we've discussed as a team, weighing the pros and cons, and ultimately, we decided it was not for us. Recently, while chatting with a colleague, she mentioned it was useful hearing our reasoning. So: Sharing time! 1/12
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Katie Mack @astrokatie.com · 24/07/2026
Me (closer plane) and @peacewind.aero (lead plane) flying the DHC-1 Chipmunks back to the Canadian Aviation Museum after a wild trip to #Oshkosh #AirVenture. Thanks to Matt in the support plane for the photos!
Two vintage yellow low-wing airplanes flying in front of a grey Chicago skylineTwo vintage yellow low-wing airplanes flying in front of a grey Chicago skyline, a little more zoomed out this timeTwo vintage yellow low-wing airplanes flying in front of a grey Chicago skyline, with the planes higher up in the skyTwo vintage yellow low-wing airplanes flying in front of a grey Chicago skyline, with perspective making the planes look very close together (we weren’t really that close)
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Scott Forbes🇨🇦 @theecologyprof.bsky.social · 17/07/2026
For anyone who thinks increasing oil & gas production is the path to energy independence, you're dead wrong. While we continue to rely on fossil fuels, we're held hostage to global pricing. The real path to energy security is local production of renewables and grid-scale storage. #EnergyTransition
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Michael Nabert @sustainablesong.bsky.social · 15/07/2026
While Prime Minister Full-Speed-Ahead-On-Climate-Arson-Without-Even-Pretending-To-Care-About-Our-Climate-Obligations eliminates our already weak climate targets, Toronto has the very worst air quality on Earth today due to climate-worsened extreme wildfires. 🇨🇦🔥🧵 1/ www.ctvnews.ca/toronto/weat...
A distressing photograph of Toronto's skyline under a thick pall of wildfire smoke turning the sky a hideous and dangerous orange. 

Overlying text reads: Just one week of wildfire smoke cost Ontario more than $1.2 Billion in additional health care costs. Mark Carney tells us that meeting what were already pathetically weak emissions targets is "too expensive."
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Kai, a very old GenX 🇨🇦 @kaicable.bsky.social · 13/07/2026
This is what Canadians want - not U.S. over-priced, under-performing, old-tech vehicles. The BYD Dolphin G a plug-In Hybrid with a 1.5-liter paired with a 195-horsepower electric motor and the combined range of 1,000 kilometers for approx. $25,000 - $35,000. #cdnpoli #canada shorturl.at/PgErb
supercarblondie.com
BYD unveils its first ever car built for global markets and it's a low cost 'game-changing' PHEV with impressive range
The BYD Dolphin G is a game-changing PHEV built from the ground up to be the brand's first truly global vehicle
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Sarah Forde 🌙🪡 @sailorastera.bsky.social · 12/07/2026
Happy anniversary of that time the post office asked me to provide evidence that my package was not delivered.
A series of photos of me pointing to places where packages could be like inside of a mailbox or on the front porch or in my hands except there is nothing there
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Atlas Shvitzed @therafischwartz.bsky.social · 08/07/2026
Unfortunately, a stunned Paris is how they all got into this whole mess to begin with
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Dr. Martin Skrodzki @msmathcomp.bsky.social · 05/07/2026
Wow. Look at all that great #MathArt over at gallery.bridgesmathart.org
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robertfathauer.bsky.social @robertfathauer.bsky.social · 05/07/2026
Over 5,500 mathematical artworks can now be browsed in an attractive new gallery-wall layout on the Bridges website, thanks to the efforts of Nathan Selikoff: gallery.bridgesmathart.org/gallery?seed...
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Craig S. Kaplan @isohedral.ca · 01/07/2026
It's a classic strategy of short-term pain, long-term more pain.
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Waterloo's David R. Cheriton School of Computer Science @uwcheritoncs.bsky.social · 29/06/2026
Our very own Professor Dave Tompkins has won the 2026 Faculty of Mathematics Award for Distinction in Teaching! The annual award is conferred to instructors who have demonstrated outstanding teaching skills and a deep commitment to student education. Congrats, Dave: cs.uwaterloo.ca/news/dave-to...
Professor Dave Tompkins in the Davis Centre
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robertfathauer.bsky.social @robertfathauer.bsky.social · 25/06/2026
The website for the 2026 Bridges Conference Exhibition of Mathematical Art, Craft, and Design is now live, featuring the work of more than 150 artists. gallery.bridgesmathart.org/exhibitions/...
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Craig S. Kaplan @isohedral.ca · 24/06/2026
Too big to succeed.
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Heather Anne Campbell @heathercampbell.bsky.social · 24/06/2026
can’t believe a narcissist is being so publicly humiliated by a reflecting pool
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Rebane @rebane2001.bsky.social · 01/02/2026
i made a version of wikipedia you can doomscroll xikipedia.org
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Polly Mackenzie @pollymackenzie.bsky.social · 21/06/2026
My nine year old asked for a Rosetta Stone cake for his birthday
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Janelle Shane @janelleshane.com · 19/06/2026
Tried this and 1. Yeah I’m in these models all right 2. Even these tiny summaries contained an outright fabrication (I did not create AI Dungeon) and half-truths (I am way more “random science blogger” than “researcher” when it comes to “AI”)
Result screenshot from InTheWeights.com for Janelle Shane. Summary reads “AI Researcher and author”, 858 strength, top 2%. Bars are shown for like 14 different LLMs, and the page is showing the snippet generated by QWEN 8B which says “AI researcher and creator of the AI Dungeon game, known for her work in machine learning and natural language processing”
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Jeff Sharlet @jeffsharlet.bsky.social · 16/06/2026
Last and least, FWIW, my current AI policy for students. Subject to revision. Recommendations welcome.
Artificial Intelligence and Creative Writing: A Policy of Sorts
This is a course for those interested in writing not as means to an end but as an end in itself.
Recently a friend and I read a cover story in New York magazine titled, “Everyone is Cheating Their
Way Through College,” by James D. Walsh. My friend has also taught writing. He likes to tell his
students, “If you want to be a writer, put on a cool hat and go sit in a bar with cheap beer. If you want to
write, write.”
I didn’t think AI would be a temptation for writing students. “Everyone is Cheating Their Way
Through College” persuaded me that for many it’s not a temptation but a condition. You sleep in a bed,
you wear clothes, you don’t scream at teachers. Just the way it is. Maybe AI is becoming that, too, part
of “just the way it is.” Maybe it is that already.
My mind raced through ideas about how to “beat” AI. The article dismantled each one of them.
Then I thought, “That’s not my job.” I’m a writer and a teacher. I’m not a cop. If you want to work with
me on writing, we can do that. If you want to cheat, you have the ability to do that, too, and the truth is,
I probably can’t stop you. Per Dartmouth’s policy: “Students may not use GenAI tools for submitted
coursework unless expressly permitted.” I do not permit it. That’s my part. Now, about yours.
I’m interested in working with students for whom writing feels, somehow, good, even if
sometimes it’s painful. Who seek that feeling anyway. A feeling of being, of alertness. Of purpose; of
intention. Of practice.
This is a course for those who are interested in using writing to experience some variation of
this feeling. Sometimes it comes in a moment of clarity, sometimes in the making of a lyrical
juxtaposition. There are so many more emotional, intellectual, and spiritual possibilities that arise from
the act of shaping language. I live off the aftermath of that act—the recognitions, financial and
otherwise, I earn from the results—but there is no payche…
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Jeff Sharlet @jeffsharlet.bsky.social · 16/06/2026
I just learned that the term "carbon footprint" was developed by BP to offload responsibility for climate change onto individuals. Something like that's happening in higher ed with AI. Institutions capitulate or dodge; students are submitting; & they believe it's their individual failing. 7/
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Katie Mack @astrokatie.com · 03/06/2026
It is important to set quantitative and achievable goals and in that spirit I have decided I will be 20% more gay this month 🏳️‍🌈
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Dr Jamie Gallagher @jamiebgall.co.uk · 02/06/2026
It’s Pride 🏳️‍🌈 Spare one repost for a small creator? 🥺 My science and sci fi pins raise money for homeless LGBTQ+ people. Just sent another £800 to @aktcharity.bsky.social bringing total to £47,521 New for Pride 2026: 🌈Scientist🌈 🏳️‍🌈🐥🦜🦅🏳️‍🌈 🌈pronouns🌈 www.jamiebgall.co.uk/shop
Pin badge “scientist” in rainbow motif Two bird pins. A series if birds sitting on a branch. Each bird is the colour of a stripe on the rainbow flag. Pronoun pins with rainbow motif:
She her 
He him 
She they 
He they 
They them An array of pride themed science and sci fi pins.
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Kate Compton @galaxykate.bsky.social · 01/06/2026
All my code is strongly typed. I type all my vanilla JS and Python myself, on a keyboard, really strongly.
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Ed Zitron @edzitron.com · 26/05/2026
Uber’s COO has said that it’s getting “harder to justify” its AI costs because there was no way to show a link between AI spend and any meaningful increase in useful features. This is the first time I’ve seen a company say this directly. www.businessinsider.com/uber-coo-and...
"That link is not there yet, right?" he said. think maybe implicitly there is more that is getting shipped, but it's very hard to draw a line between one of those stats and, 'Okay, now we're actually producing 25% more useful consumer features."
He said that the trade-off costs from Al are harder to justify because he can't draw a direct link. Earlier this month, CEO Dara Khosrowshahi said in an earnings call that Uber was slowing hiring to counter its investments in AI.The comment led to what he described as a
"head-exploding moment," sparking discussions about AI token consumption within the company and the trade-offs it creates, such as on head count.
He said that, based on talks with Uber's senior engineering leaders, he realized higher token usage did not translate into a proportional increase in useful consumer features.
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👻madeline bOoOoOoOodent👻 @oldenoughtosay.com · 17/05/2026
I’m sorry but if you aren’t sure of a citation, whether what it means or that it exists… why are you citing it. why are you referring to something you haven’t read or don’t understand? that defeats the entire bloody point
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Tod Maffin 🇨🇦 @todmaffin.com · 14/05/2026
HOLY CRAP! More than 12,000 people have completed my "Tod's Long-form #Census" (and counting)! That's way more more than most public opinion polls. There were 70+ questions. Here are four so far. ✅ Take it: census.todmaffin.com 📊 Full results coming in my newsletter: newsletter.todmaffin.com
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Adam Sharp @adamcsharp.bsky.social · 13/05/2026
My favourite phrases for when things go wrong… 1. It’s a shitshow at the fuck factory (English) 2. Now the turnips are cooked (Dutch) 3. A donkey is inside another donkey (Persian) 4. The Devil is loose in Salmonstreet (Danish) 5. A finger in the ass and screaming everywhere (Brazilian Portuguese)
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robertfathauer.bsky.social @robertfathauer.bsky.social · 08/05/2026
Emily Groshoz, a poet and philosopher who was a member of the Bridges community, passed away on May 2nd. You can read one of her math-inspired poems, "In Praise of Fractals", here: mathartfun.com/fractaldiver...
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Dr. Martin Skrodzki @msmathcomp.bsky.social · 30/04/2026
I am looking forward to this year's Bridges #MathArt conference. It was fun being the Regular Papers Chair, but it was also quite some work (my Thunderbird folder counts close to 2k received or written emails 😅). Yet, the works are amazing, cannot wait for Galway in August. 🇮🇪
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The Onion @theonion.com · 29/04/2026
Supreme Court Overturns ‘Right v. Wrong’ theonion.com/supreme-court-overturn…
Supreme Court Overturns ‘Right v. Wrong’
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European Association for Theoretical Computer Science @eatcs.bsky.social · 27/04/2026
The 2026 Presburger Award for Young Scientists goes to Vincent Cohen-Addad and @gautamkamath.com 🥳🎉 You can read the laudatio here:
eatcs.org
Presburger Award 2026 – Laudatio
European Association for Theoretical Computer Science
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Robert (Bob) Bosch @baabbbaash.bsky.social · 15/04/2026
Cover art for the May 2026 issue of the Notices of the American Mathematical Society. Here's a link to the issue: www.ams.org/notices
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Katie Mack @astrokatie.com · 05/04/2026
I don't know how anyone else feels about this, but to me, sharing a screenshot of chatbot output to make a point of some kind is an excellent way to undermine any credibility that might otherwise be granted to you in the context of whatever you're trying to say.
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SMBC Comics @smbccomics.bsky.social · 24/03/2026
There should be demotivational YouTube math videos. Just to be different. COMIC ◆ www.smbc-comics.com/comic/phi PATREON ◆ www.patreon.com/ZachWeinersm... STORE ◆ smbc-store.myshopify.com
4-panel SMBC comic update. A teacher is speaking to a class. She tells the kids that today they will be learning about Phi, the golden ratio. She points out that "when you look at flowers, at nautilus shells, at the arms of spiral galaxies... None of those produce the golden ratio because its infinite decimal expansion defies the sort of precision found in nature!" The teacher continues in the following panel with "Nothing is golden in this fallen world, kids!" In the final panel, a student raises their arm to ask if the teacher is still letting the divorce intrude on her work-life, to which the teacher replies "did you know if you count the points on a pinecone they are still less numerous than your sorrows?"
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Aaron Hertzmann @aaronhertzmann.com · 25/03/2026
Here's Henri Matisse drawing a portrait of his son. Watch his head and eyes, and how often they look back and forth between his drawing and his son. Why does he look back and forth so frequently—why can't he just draw his son from memory?
And where exactly is he looking? 4/
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Grant Sanderson @3blue1brown.com · 22/03/2026
This video was a complete joy to make. Here's a short preview, but next time you're looking to sit down for 45 minutes of math and art, take a look at the full version on YouTube: youtu.be/ldxFjLJ3rVY
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Seth Rosenthal @sethrosenthal.bsky.social · 20/03/2026
i think it's smart that the Wikipedia page for Chips and Dip opens with a "Rationale" section. a lot of people are flabbergasted to find out about this concept and need some grounding before they get into the history
Rationale

Usually the chips served are not flavored, or flavored only mildly, and the dip serves as a condiment. Serving them separately allows for simultaneous consumption, while also allowing for the eater to control the amount of dip according to their preference. When made from purchased processed foods, the dish is an easy finger food, as each item requires almost no further preparation. Not to mention, there is a large amount of combinatorial possibility inherent to the choice of dip being paired to the chip chosen.
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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 19/03/2026
I'm enormously happy to finally be able to announce the date of the #BeachSpectres project: 7th June, 2026. #WhitleyBay beach, UK. If you can make it to the beach and join in with the tiling effort, I'll be very happy to see you and glad of the help! Lots […] [Original post on mathstodon.xyz]
Poster: Beach Spectres, we want to make the largest aperiodic tiling ever!
What's an aperiodic tiling?
It's when you cover a flat surface with copies of a shape like the one above,
without any repeating patterns. The Spectre monotile was only discovered in
2023, and mathematicians are really excited about it!
What are you doing?
We're going to use large “cookie cutter” tools in the shape of the Spectre to
cover the beach with the aperiodic tiling.
You can help: come to the beach and we'll show you what to do.
Where and when?
Whitley Bay beach, 7th June 2026.
Come and join in, just watch, or talk to some very
enthusiastic mathematicians!
beachspectres.com
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Kate Compton @galaxykate.bsky.social · 17/03/2026
Greek mythology makes a lot more sense now that I have a set of unaccountable powerful people with stupid and obvious flaws and no way to smite them myself
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