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Posts by Carles Sáez

Aquí os espero, en el INE no se vive mal

6 days ago 1 0 1 0

I agree, I was just paraphrasing the original bluit

1 week ago 1 0 0 0

* Modules are a special case of sets because every module is just a set with extra structure
* Modules are a generalization of sets because every set is an F_1-module

1 week ago 5 0 1 0

Well, it's a great book, so it can be a good idea! But, since the book is 400 years old, it will be quite difficult to read even if you achieve a good level of modern Spanish (Spanish has evolved quite a bit since the XVIIth century!)

1 week ago 1 0 1 0

Yo aluciné en colores cuando me leí el Quijote. ¿Humor absurdo, sátira, crítica social, ...? Está todo allí. ¿Todos esos juegos metanarrativos que parecen tan modernos? Cervantes ya los hizo antes en el Quijote.

1 week ago 1 0 1 0
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Finalmenchi.
Finalmenchi a mis 34 años me voy a leer El Señor de los Anillos de la gente que le dice a Reverte "Don Arturo".

2 weeks ago 682 169 28 36

The LLM takeover has made everything in computing so loosey-goosey. "Maybe it will work. Empirically, there's a good probability...". This is not what interested me about computing. Of course, sometimes it does work, which is magic. I am just a curmudgeon who doesn't like magic.

3 weeks ago 264 16 6 1

Some more-or-less equivalent facts about probabilities:

1) for random variables of a given mean and variance, the Chebyshev-Cantelli inequality provides an upper bound on tail probabilities

2) for random variables of a given variance, the mean and quantile (at a given level) can't differ too much

1 month ago 11 1 1 0
Born to Prove
S \simeq K(FinSet)

Forced to Compute
[mathematical expression for the Novikov spectral sequence]

Born to Prove S \simeq K(FinSet) Forced to Compute [mathematical expression for the Novikov spectral sequence]

Gonna get this printed on a hat and wear it to conferences. 🧮

1 month ago 31 4 2 0
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USA is not a safe place anymore. No international event should be held there

1 month ago 3 0 0 0

Moreover, ICM2026 must be cancelled #DelendaICM

1 month ago 4 1 0 1

I get to teach this to my topology students today and am dying to see how mad they get about it.

1 month ago 16 2 2 0

That's incredibly easy if you are very confident that CH is false: ℵ_1

1 month ago 8 0 0 0
image of a simplistic face drawn only with straight lines

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.

2 months ago 54 18 1 2
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Set theory for category theory Questions of set-theoretic size play an essential role in category theory, especially the distinction between sets and proper classes (or small sets and large sets). There are many different ways to f...

I think this is still the best reference for these issues
arxiv.org/abs/0810.1279

2 months ago 4 0 0 0

slopXiv has been invented

2 months ago 2 0 0 0
2 months ago 36 7 5 0

cosigned. this is def worth watching. very good, methodical breakdown of what happened from a person with a military/DHS background.

2 months ago 223 71 6 3

There 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.

2 months ago 9 3 3 0
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Es 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.

2 months ago 1 0 0 0

Wtf is wrong with these Feynman fanboys?

2 months ago 7 0 2 0

Te escribo por MD

3 months ago 1 0 0 0

Vaya, 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

3 months ago 1 0 1 0

Lo 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

3 months ago 1 0 1 0

Suerte con los destinos! A ver si apruebas las de Andalucía o te puedes cambiar en breve

3 months ago 1 0 0 0

Yo ahora vivo en Segovia y estoy muy contento (mucho mejor que el infierno en la Tierra que es Madrid)

3 months ago 1 0 1 0

Maybe 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

3 months ago 2 0 0 0

Good job bunny!

4 months ago 1 0 0 0
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4 months ago 26 2 0 0
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🐴 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.

5 months ago 17 10 2 0