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Pierre Alquier

@pierrealquier

Professor of Statistics @ ESSEC Business School Asia-Pacific campus Singapore ๐Ÿ‡ธ๐Ÿ‡ฌ https://pierrealquier.github.io/ Previously: RIKEN AIP ๐Ÿ‡ฏ๐Ÿ‡ต ENSAE Paris ๐Ÿ‡ซ๐Ÿ‡ท ๐Ÿ‡ช๐Ÿ‡บ UCD Dublin ๐Ÿ‡ฎ๐Ÿ‡ช ๐Ÿ‡ช๐Ÿ‡บ Random posts about stats/maths/ML/AI, poor jokes & birds photo ๐ŸŒˆ

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Latest posts by Pierre Alquier @pierrealquier

There

bsky.app/profile/pier...

12.03.2026 01:39 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

I agree with this. And it seems related to a question I had on my mind (even though I was not able to ask it very accurately)

12.03.2026 01:38 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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Yellow bittern @ Jurong lake garden #birds

12.03.2026 01:35 ๐Ÿ‘ 5 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Recording from my talk

โ€œ๐™ณ๐šข๐š—๐šŠ๐š–๐š’๐šŒ ๐š๐šŠ๐š—๐š๐š˜๐š– ๐™ฟ๐šŠ๐š›๐š๐š’๐š๐š’๐š˜๐š—๐šœ: ๐™ฐ๐š™๐š™๐š•๐š’๐šŒ๐šŠ๐š๐š’๐š˜๐š—๐šœ, ๐™พ๐š™๐š™๐š˜๐š›๐š๐šž๐š—๐š’๐š๐š’๐šŽ๐šœ, ๐šŠ๐š—๐š ๐™ฒ๐š‘๐šŠ๐š•๐š•๐šŽ๐š—๐š๐šŽ๐šœโ€

at the ICERM Workshop: ๐๐จ๐ง๐ฉ๐š๐ซ๐š๐ฆ๐ž๐ญ๐ซ๐ข๐œ ๐๐š๐ฒ๐ž๐ฌ๐ข๐š๐ง ๐ˆ๐ง๐Ÿ๐ž๐ซ๐ž๐ง๐œ๐ž -๐‚๐จ๐ฆ๐ฉ๐ฎ๐ญ๐š๐ญ๐ข๐จ๐ง๐š๐ฅ ๐ˆ๐ฌ๐ฌ๐ฎ๐ž๐ฌ

Video: icerm.brown.edu/video_archiv... #BayesianNonparametrics

11.03.2026 08:31 ๐Ÿ‘ 1 ๐Ÿ” 1 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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On the importance of abstract, from @lateinteraction.bsky.social on X:

11.03.2026 19:25 ๐Ÿ‘ 16 ๐Ÿ” 2 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 0
Patrice Jeener, le graveur de mathรฉmatiques [Documentaire Scientifique IHP]
Patrice Jeener, le graveur de mathรฉmatiques [Documentaire Scientifique IHP] YouTube video by Institut Henri Poincarรฉ

youtu.be/P0x9W9U5e9k?...

11.03.2026 18:42 ๐Ÿ‘ 1 ๐Ÿ” 1 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Patrice Jeener, artiste-graveur posant devant deux de ses dessins donnรฉs au Palais de la dรฉcouverte et installรฉs sur le balcon des mathรฉmatiques. ร€ l'occasion de l'inauguration de l'exposition permanente de ces dons, le 27 mai 2009.

Patrice Jeener, artiste-graveur posant devant deux de ses dessins donnรฉs au Palais de la dรฉcouverte et installรฉs sur le balcon des mathรฉmatiques. ร€ l'occasion de l'inauguration de l'exposition permanente de ces dons, le 27 mai 2009.

Vue de 8 dessins de Patrice Jeener sur le balcon des mathรฉmatiques au Palais de la dรฉcouverte (avant sa fermeture pour rรฉnovation).

Vue de 8 dessins de Patrice Jeener sur le balcon des mathรฉmatiques au Palais de la dรฉcouverte (avant sa fermeture pour rรฉnovation).

Nous avons appris la nouvelle du dรฉcรจs de Patrice Jeener, compagnon de longue date du Palais de la dรฉcouverte et donateur de gravures. Artiste-graveur il y avait trouvรฉ, lorsqu'il รฉtait รฉtudiant, matiรจre ร  transformer des รฉquations en ล“uvres.
โฌ‡๏ธ

11.03.2026 15:58 ๐Ÿ‘ 6 ๐Ÿ” 3 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Say, if I see this in code written by my students, it can mean two things: either they understood my weak joke, or they simply believed blindly everything I said.

In both cases, they deserve to pass ๐Ÿ˜‡

11.03.2026 11:25 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

One can argue itwas not an amazing joke ๐Ÿ˜…

11.03.2026 11:16 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

That was the joke ๐Ÿค—

11.03.2026 11:15 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

In Python, if you don't set a seed yourself, it's automatically set using the current system time. Which is why in this case you get different results every time you run the code.

11.03.2026 09:18 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

The code

rd.seed( a = 1 )
rd.seed( a = rd.randint(0,1000) )

will lead to a funny but constant seed.

But using

rd.seed( a = rd.randint(0,1000) )

(without fixing the seed first) will fix the seed randomly.

11.03.2026 07:34 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

In order to get reproducible results, many people say we should fix the random seed. However, it is little known that it leads to randomness which is always the same, which is not so random. I found an easy patch, don't hesitate to use it:

import random as rd
rd.seed( a = rd.randint(0,1000) )

11.03.2026 07:02 ๐Ÿ‘ 7 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Haha. I mean, yes, we pay in SGD in Singapore, and that's really cool ๐Ÿ˜Ž

11.03.2026 06:49 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

I liked this post, I wonder why ๐Ÿฆ ๐Ÿค—

11.03.2026 06:47 ๐Ÿ‘ 3 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Today, I bought a can of iced woolong tea. I was supposed to pay 1.10 SGD but someone forgot 0.10 on the machine, so I only paid 1.00. I feel guilty about it.

If you are the one who forgot 0.10 in the machine, please contact me so that I can reimburse you.

11.03.2026 06:44 ๐Ÿ‘ 6 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Today, AI solved a problem that I was definitely not able to solve by myself: it helped me going through the AISTATS formatting checker and removing all problems. Some of them were non-trivial (I was not able to find solutions online). AI fixed them while providing pedagogical explanations.

11.03.2026 06:41 ๐Ÿ‘ 8 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Thanks.

I like these birds so much!

11.03.2026 02:14 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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Couple of Javan pond herons @ Bishan park #birds

10.03.2026 23:13 ๐Ÿ‘ 24 ๐Ÿ” 1 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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New short paper forthcoming in Statistics & Probability Letters:

An objective non-local prior for skew-symmetric models.

arxiv.org/abs/2603.08285

This paper develops a Moment-Objective Minimum-Discrepancy (MOOMIN) Prior for testing symmetry against skew-symmetric alternatives.

10.03.2026 07:19 ๐Ÿ‘ 5 ๐Ÿ” 2 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
Preview
Learning Functions of Halfspaces We give an algorithm that learns arbitrary Boolean functions of $k$ arbitrary halfspaces over $\mathbb{R}^n$, in the challenging distribution-free Probably Approximately Correct (PAC) learning model, ...

Well, this seems like a big deal. arxiv.org/abs/2603.087...

"This is the first algorithm that can PAC learn even intersections of two halfspaces in time 2^o(n)."

10.03.2026 04:03 ๐Ÿ‘ 30 ๐Ÿ” 6 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
Preview
Devenir professeur ร  l'ESSEC || ESSEC | ESSEC Africa ๐Ÿ“ข ESSEC Business School โ€“ Africa Campus is hiring As part of the development of its academic programs, ESSEC Business School โ€“ Africa campus is recruiting a full-time Professor in Finance (PMP). We ...

Our campus in Morocco is hiring.

www.linkedin.com/posts/esseca...

10.03.2026 03:06 ๐Ÿ‘ 3 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Preview
Numerical Analysis School 2026 | yannig goude Ouverture des inscriptions pour l'รฉdition 2026 de lโ€™ร‰cole dโ€™รฉtรฉ dโ€™analyse numรฉrique, organisรฉe conjointement par le CEA, EDF et Inria. Cet รฉvรฉnement se tiendra au CEA Liten (Bourget du lac) et portera...

I forward a post by Yannig Goude on LinkedIn about an exciting event.

www.linkedin.com/posts/yannig...

10.03.2026 02:45 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Excellent

10.03.2026 01:06 ๐Ÿ‘ 5 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Preview
Postdoctoral Research Associate in Theoretical Computer Science and Algorithms Full time, fixed term for two years (with the possibility of extension) Located on the Camperdown Campus, University of Sydney Base Salary Academic Level A $109,263 - $121,054 + 17% superannuation Abo...

On the postdoc job market? "As foretold" some time ago, the Sydney Algorithms and Computing Theory group at @sydneycompsci.bsky.social is hiring postdocs (2 years, renewable) in Theoretical Computer Science and Algorithms!

usyd.wd105.myworkdayjobs.com/en-GB/USYD_E... #TCSSky

09.03.2026 23:26 ๐Ÿ‘ 14 ๐Ÿ” 6 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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Little heron @ Kallang river #birds

10.03.2026 00:58 ๐Ÿ‘ 32 ๐Ÿ” 2 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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Didn't know that this one had a name, but it's a cute one. There's a nice "polynomial-style" proof (cf. SoS hierarchies etc.), a nice "martingale-style" proof, and probably some others too. Neat!

08.03.2026 13:36 ๐Ÿ‘ 14 ๐Ÿ” 2 ๐Ÿ’ฌ 3 ๐Ÿ“Œ 0
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Chinese pond heron @ Bishan park #birds

09.03.2026 02:20 ๐Ÿ‘ 20 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

I don't really understand why the statement requires numbers a_1 ... a_n ? The proof seems to be valid for any rv A in the interval [m,M] right? Am I missing something?

08.03.2026 14:40 ๐Ÿ‘ 3 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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Streets of Ho Chi Minh city

08.03.2026 05:39 ๐Ÿ‘ 12 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0