Arthur Charpentier
@freakonometrics.bsky.social
Dad of 3 & born-again mathematician. Statistician, economist, fellow actuary & data addict. Professor & researcher in Kyoto 京都. Previously in Montréal, Paris, Hong Kong, Leuven & Rennes. Full of 'satiable curtiosity https://mastodon.social/@freakonometrics
"Et si les cyclistes avaient raison de ne pas s’arrêter aux stops ?" freakonometrics.hypotheses.org/84830
November 10, 2025 at 5:39 AM
"Et si les cyclistes avaient raison de ne pas s’arrêter aux stops ?" freakonometrics.hypotheses.org/84830
Reposted by Arthur Charpentier
A very offline cousin sent this to fam group chat. This story is breaking containment.
October 24, 2025 at 11:36 PM
A very offline cousin sent this to fam group chat. This story is breaking containment.
Kyoto, Fall 2025 🍂
November 8, 2025 at 8:52 AM
Kyoto, Fall 2025 🍂
Reposted by Arthur Charpentier
"Being Anti-Trump is probably illegal"
3 minutes on things that have happened in America over the weekend, concentrating on violating Democratic norms.
youtu.be/40OBi4acYYI
3 minutes on things that have happened in America over the weekend, concentrating on violating Democratic norms.
youtu.be/40OBi4acYYI
2 November: 'being Anti-Trump is probably illegal'
YouTube video by Professor Christina Pagel
youtu.be
November 2, 2025 at 9:01 PM
"Being Anti-Trump is probably illegal"
3 minutes on things that have happened in America over the weekend, concentrating on violating Democratic norms.
youtu.be/40OBi4acYYI
3 minutes on things that have happened in America over the weekend, concentrating on violating Democratic norms.
youtu.be/40OBi4acYYI
"In 1887, the French railways unilaterally decided to move every clock in every railway station 5 minutes behind Paris time. Meanwhile, the clocks outside the stations remained untouched. So why on earth (or at least, in France) would you do that?" www.youtube.com/watch?v=PELr... #soFrench
Why French Railway Stations Delayed Their Clocks (& What Happened When They Did)
YouTube video by The Tim Traveller
www.youtube.com
November 2, 2025 at 11:02 AM
"In 1887, the French railways unilaterally decided to move every clock in every railway station 5 minutes behind Paris time. Meanwhile, the clocks outside the stations remained untouched. So why on earth (or at least, in France) would you do that?" www.youtube.com/watch?v=PELr... #soFrench
Kyūshū Island, Fall 2025
October 31, 2025 at 10:00 AM
Kyūshū Island, Fall 2025
Kyūshū Island, Fall 2025
October 30, 2025 at 1:48 PM
Kyūshū Island, Fall 2025
"Les maths à la rescousse de l’intelligence artificielle" www.lemonde.fr/sciences/art... "Si les potentialités des IA en mathématiques ne cessent de croître, celles-ci continuent d’avoir besoin de cette discipline pour améliorer leurs performances"
Les maths à la rescousse de l’intelligence artificielle
Si les potentialités des IA en mathématiques ne cessent de croître, celles-ci continuent d’avoir besoin de cette discipline pour améliorer leurs performances.
www.lemonde.fr
October 29, 2025 at 12:13 PM
"Les maths à la rescousse de l’intelligence artificielle" www.lemonde.fr/sciences/art... "Si les potentialités des IA en mathématiques ne cessent de croître, celles-ci continuent d’avoir besoin de cette discipline pour améliorer leurs performances"
"In the 1940s, when the French mathematician Jacques Hadamard asked good mathematicians how they came up with solutions to hard problems, they nearly universally answered that they didn’t think in words; neither did they think in images or equations" www.henrikkarlsson.xyz/p/wordless-t...
When is better to think without words?
Non-verbal, blurry thinking is faster and can search in a broader way, but it is more error-prone than verbal thought.
www.henrikkarlsson.xyz
October 28, 2025 at 9:21 PM
"In the 1940s, when the French mathematician Jacques Hadamard asked good mathematicians how they came up with solutions to hard problems, they nearly universally answered that they didn’t think in words; neither did they think in images or equations" www.henrikkarlsson.xyz/p/wordless-t...
Kyūshū Island, Fall 2025
October 26, 2025 at 11:13 PM
Kyūshū Island, Fall 2025
Himeji (姫路市), Fall 2025
October 23, 2025 at 12:35 PM
Himeji (姫路市), Fall 2025
In less than two weeks, the graduate course “Global Mathematics Lecture IV” at Kyoto University will begin, consisting of five lectures. The course will be largely based on this book though lecture notes will also be distributed link.springer.com/book/10.1007...
October 22, 2025 at 12:55 AM
In less than two weeks, the graduate course “Global Mathematics Lecture IV” at Kyoto University will begin, consisting of five lectures. The course will be largely based on this book though lecture notes will also be distributed link.springer.com/book/10.1007...
"Universities have existed for more than a thousand years — and for almost all of that time, they weren’t centers of research. What changed in 19th century Germany?" asteriskmag.substack.com/p/the-origin...
The Origin of the Research University
Universities have existed for more than a thousand years — and for almost all of that time, they weren’t centers of research. What changed in 19th century Germany?
asteriskmag.substack.com
October 21, 2025 at 11:09 PM
"Universities have existed for more than a thousand years — and for almost all of that time, they weren’t centers of research. What changed in 19th century Germany?" asteriskmag.substack.com/p/the-origin...
"Sexual selection drives sex difference in adult life expectancy across mammals and birds" www.science.org/doi/10.1126/...
October 21, 2025 at 11:07 PM
"Sexual selection drives sex difference in adult life expectancy across mammals and birds" www.science.org/doi/10.1126/...
Kaamran Hafeez, kaamranhafeez.com/product/i-do...
“I don’t get it. We had all those meetings”
“I don’t get it. We had all those meetings”
October 20, 2025 at 10:34 PM
Kaamran Hafeez, kaamranhafeez.com/product/i-do...
“I don’t get it. We had all those meetings”
“I don’t get it. We had all those meetings”
"Bird migration is changing. What does this reveal about our planet?" www.theguardian.com/environment/...
Bird migration is changing. What does this reveal about our planet? – visualised
Bird migrations rank as one of nature’s greatest spectacles. Thanks to GPS tracking, scientists are uncovering extraordinary insights into ancient and mysterious journeys – and new threats that are re...
www.theguardian.com
October 20, 2025 at 10:18 PM
"Bird migration is changing. What does this reveal about our planet?" www.theguardian.com/environment/...
Kyoto, Fall 2025
October 18, 2025 at 8:49 AM
Kyoto, Fall 2025
Joe Dator: The Centaur Scale attemptedbloggery.blogspot.com/2025/10/joe-...
Joe Dator: The Centaur Scale
Understanding the world one cartoon at a time. And other high culture. New Yorker artists are royalty here.
attemptedbloggery.blogspot.com
October 16, 2025 at 7:52 AM
Joe Dator: The Centaur Scale attemptedbloggery.blogspot.com/2025/10/joe-...
"La parité, comme condition d'équilibre stable non dégénéré" freakonometrics.hypotheses.org/84076
La parité, comme condition d’équilibre stable non dégénéré
Alors que le Sénat, en France, publie un rapport “femmes et sciences“, s’inquiétant de la sous-représentées des femmes dans les domaines et les carrières scientifiques (à tel point que pour l’illustra...
freakonometrics.hypotheses.org
October 15, 2025 at 10:18 AM
"La parité, comme condition d'équilibre stable non dégénéré" freakonometrics.hypotheses.org/84076
"A Classic Graphic Reveals Nature’s Most Efficient Traveler" www.scientificamerican.com/article/a-hu... (spoiler: human on bicycle)
The Most Efficient Traveler Isn’t a Bird or a Fish—It’s You on a Bike
A famous graphic, now updated, compares locomotion in the animal kingdom
www.scientificamerican.com
October 14, 2025 at 11:38 PM
"A Classic Graphic Reveals Nature’s Most Efficient Traveler" www.scientificamerican.com/article/a-hu... (spoiler: human on bicycle)
"Does the news reflect what we die from?" ourworldindata.org/does-the-new...
October 14, 2025 at 12:37 PM
"Does the news reflect what we die from?" ourworldindata.org/does-the-new...
"How far did the horizons of our first ancestors extend? In the furthest past, even the nearest ridge of hills might then have disclosed a sight no human eyes had ever seen, and every river crossed was a ford into the unknown" www.palladiummag.com/2025/10/10/m...
Mariners at the Dawn of History
www.palladiummag.com
October 14, 2025 at 12:17 AM
"How far did the horizons of our first ancestors extend? In the furthest past, even the nearest ridge of hills might then have disclosed a sight no human eyes had ever seen, and every river crossed was a ford into the unknown" www.palladiummag.com/2025/10/10/m...
Kyoto, Fall 2025
October 13, 2025 at 10:09 AM
Kyoto, Fall 2025
"Class: A Guide Through the American Status System," www.thepsmiths.com/p/joint-revi...
JOINT REVIEW: Class, by Paul Fussell
Class: A Guide Through the American Status System, Paul Fussell (1983; Touchstone, 1992).
www.thepsmiths.com
October 11, 2025 at 10:49 PM
"Class: A Guide Through the American Status System," www.thepsmiths.com/p/joint-revi...
"After 30 years of clicking, scrolling, and optimizing pixels, websites are becoming obsolete. LLM agents will read and act for us, ending search engines, blue links, and traditional websites." www.nicolasbustamante.com/p/chatgpt-ki...
ChatGPT Killed the Web: For the Better?
After 30 years of clicking, scrolling, and optimizing pixels, websites are becoming obsolete. LLM agents will read and act for us, ending search engines, blue links, and traditional websites.
www.nicolasbustamante.com
October 11, 2025 at 10:48 PM
"After 30 years of clicking, scrolling, and optimizing pixels, websites are becoming obsolete. LLM agents will read and act for us, ending search engines, blue links, and traditional websites." www.nicolasbustamante.com/p/chatgpt-ki...