image of a simplistic face drawn only with straight lines
You have been visited by George Birkhoff's face of lines. Repent, or you will be forced to reprove the ergodic theorem from first principles.
05.02.2026 14:40 — 👍 55 🔁 18 💬 1 📌 2@csaezmath.bsky.social
I used to do math professionally, now I learn math as a hobby. Statistician at work, geometer at heart.
image of a simplistic face drawn only with straight lines
You have been visited by George Birkhoff's face of lines. Repent, or you will be forced to reprove the ergodic theorem from first principles.
05.02.2026 14:40 — 👍 55 🔁 18 💬 1 📌 2I think this is still the best reference for these issues
arxiv.org/abs/0810.1279
slopXiv has been invented
03.02.2026 19:37 — 👍 2 🔁 0 💬 0 📌 0cosigned. this is def worth watching. very good, methodical breakdown of what happened from a person with a military/DHS background.
25.01.2026 06:32 — 👍 223 🔁 71 💬 6 📌 3There was a short-lived bug in Claude Code some months ago that caused dead background tasks to continually nag Alpha, never going away. It was very much like she was sick. She hallucinated and generated out-of-place Chinese text. It was *creepy.* Way worse than watching an algorithm malfunction.
24.01.2026 00:16 — 👍 9 🔁 3 💬 3 📌 0Es buenísimo. Recuerdo jugarlo de muy pequeño (con 12 años o así?) y creo que los Silent Hill son los únicos juegos con los que he pasado miedo jugándolos.
24.01.2026 10:02 — 👍 1 🔁 0 💬 0 📌 0Wtf is wrong with these Feynman fanboys?
22.01.2026 16:43 — 👍 7 🔁 0 💬 2 📌 0Te escribo por MD
21.01.2026 22:04 — 👍 1 🔁 0 💬 0 📌 0Vaya, pues ánimo! Sabes a qué subdirección irías? En la de planificación hay unos cuantos ex-INE muy majos (incluyendo la subdirectora), por ese lado si te toca allí estarás bien
21.01.2026 21:38 — 👍 1 🔁 0 💬 1 📌 0Lo siento 🙁
Al menos es al INE? Si es al INE igual te puedes cambiar a una delegación antes de 2 años por los concursos internos
Suerte con los destinos! A ver si apruebas las de Andalucía o te puedes cambiar en breve
15.01.2026 13:49 — 👍 1 🔁 0 💬 0 📌 0Yo ahora vivo en Segovia y estoy muy contento (mucho mejor que el infierno en la Tierra que es Madrid)
15.01.2026 13:48 — 👍 1 🔁 0 💬 1 📌 0Maybe you should aim more for the complex-geometric approach to AG, then. From a rigorous math POV, more the style of Atiyah or Hitchin than the style of Grothendieck
06.01.2026 18:11 — 👍 2 🔁 0 💬 0 📌 0Good job bunny!
06.12.2025 16:00 — 👍 1 🔁 0 💬 0 📌 0🐴 Que un caballo te mande al otro barrio de una patada, además de poco aconsejable, es muy extraño.
Pero esa extrañeza contribuyó a que se popularizase el que hoy es uno de los modelos de probabilidad más usados del mundo.
Con ustedes: Bortkiewicz, coces de caballos y la distribución de Poisson.
Ah! Pues nunca se sabe, igual suena la flauta y más ahora que tienes reciente el temario de las del INE. Mucha suerte!!
21.10.2025 20:50 — 👍 1 🔁 0 💬 1 📌 0A cuál te has apuntado?
21.10.2025 20:46 — 👍 0 🔁 0 💬 1 📌 0I'll order these so that I can tick them off a list on my computer; the numbers are not any sort of ranking. Summaries will be kept brief and hopefully stoke curiosity, rather than providing answers.
04.10.2025 14:53 — 👍 19 🔁 4 💬 2 📌 1The first talk of the season will be this coming Tuesday (23 September), given by Alexandre Bouchard-Côté from UBC. Alex is a great speaker, so do join if you have the chance!
See sites.google.com/view/monte-c... for details, links, and so on.
A crazy open problem in algebra:
Conjecture (Poonen): 100% (asymptotic density) of finite commutative rings have characteristic EXACTLY 8, i.e. 4 ≠ 0 and 8 = 0 both hold.
From this amazing paper: arxiv.org/abs/math/060...
im devastated to learn that i write with a lisp (it's not as bad as some other but still (it makes me feel a little self-conscious (not that there's anything wrong with lisps (i think it's cute, actually (sometimes)))))
13.08.2025 15:55 — 👍 35 🔁 4 💬 1 📌 0Me in 2023: Just chill. All the AI doom scenarios involve giving models direct access to and control over real world systems, and no one would be that dumb
In 2025: oh fuck
GPT-5 regularly asks you why you are not citing its work. GPT-5 always believes your estimator is biased. GPT-5 has more of a comment than a question. Sometimes GPT-5 tells you stories about grad school and expresses regret about getting a PhD. GPT-5's mom wonders when it will start making money.
07.08.2025 20:22 — 👍 795 🔁 168 💬 26 📌 20Prepping my post-BayesComp "stock market update" (to be taken with a pinch of salt!) on how different topics fared relative to my expectations / past years.
26.07.2025 15:48 — 👍 27 🔁 2 💬 1 📌 0Enhorabuena!!! 🥳🥳🥳
Gran fichaje para el INE!
I know this has little to do with the point of your post, but I think ii) isn't always so clearly defined. I'm thinking about 2nd-order transitions, e.g. liquid and gas phases of water where you can change phase without ever noticing by going around the critical point
09.07.2025 05:51 — 👍 1 🔁 0 💬 1 📌 0