Arthur Charpentier
freakonometrics.bsky.social
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 .. more

Economics 34%
Mathematics 20%

"Et si les cyclistes avaient raison de ne pas s’arrêter aux stops ?" freakonometrics.hypotheses.org/84830

Kyoto, Fall 2025

Kyoto, Fall 2025 🍂
"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
2 November: 'being Anti-Trump is probably illegal'
YouTube video by Professor Christina Pagel
youtu.be

"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

Kyūshū Island, Fall 2025

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

Kyūshū Island, Fall 2025 (Sasebo)

Kyūshū Island, Fall 2025

"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

Kyūshū Island, Fall 2025
A very offline cousin sent this to fam group chat. This story is breaking containment.

Himeji (姫路市), Fall 2025

Himeji (姫路市), Fall 2025

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...

"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

"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”

Kyoto, Fall 2025

Kyoto, Fall 2025

la suite freakonometrics.hypotheses.org/84230 avec des simulations

c'est une analyse un peu sommaire... taper les maths dans un billet de blog c'est toujours un peu pénible, mais si j'ai le courage, je le ferais... ça tombe assez bien...

"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

"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