Samuel Vaiter
@samuelvaiter.com
đ€ 3042
đ„ 270
đ 438
CNRS Researcher in maths & computer science. website:
https://samuelvaiter.com
We hosted in Nice
@aymericdieuleveut.bsky.social
& A. Taylor for the SMAI-MODE 2026 mini-course on Performance Estimation Problems with 9 hours of lectures + practicals in two days All material freely available đ
performanceestimation.github.io/Tutorial-SMA...
Thanks to both of them!
3 days ago
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reposted by
Samuel Vaiter
LJAD-Off
12 days ago
đ JournĂ©e internationale des droits des femmes : portrait de Simona Rota Nodari, chercheuse en mathĂ©matiques au LJAD, Ă dĂ©couvrir dans « Ces femmes qui font bouger les lignes » đ
univ-cotedazur.shorthandstories.com/ces-femmes-q...
#8mars
#FemmesEnScience
#UniversiteCoted'Azur
#VilledeNice
#CNRS
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đ§” New preprint! Towards Understanding Steering Strength w/ M. Taimeskhanov and D. Garreau Activation steering is a popular way to control LLM behavior at inference. But how much should you steer? We provide the first theoretical analysis of the steering strength α. đ
arxiv.org/abs/2602.02712
1/7
12 days ago
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reposted by
Samuel Vaiter
Rémi Flamary
about 2 months ago
Bullshit is like entropy nowadays it can only increase.
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Itâs incredible that the growth rate of administrative bullshit outpaces LLM progress, but here we are.
about 2 months ago
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Vu que le chauffage est visiblement un dĂ©tail, on trouve des alternatives. Startup-nation đ€
about 2 months ago
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reposted by
Samuel Vaiter
Yann Traonmilin
2 months ago
Save the date : on organise un workshop sur les maths de l'IA à Bordeaux les 4-6 novembre. N'hésitez pas ! plus on est de fous plus on rit ! (dans les limites des capacités d'accueil haha) Dates & infos :
wmathsia2026.sciencesconf.org
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Workshop sur les mathématiques de l'IA - Sciencesconf.org
Le workshop se déroulera sous forme de présentations sur appel à contribution (résumé d'une page). Une session poster sera organisée au besoin selon le nombre de contributions.
https://wmathsia2026.sciencesconf.org/
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After the 2168 series, I read
@fabinou.bsky.social
series on building a Quake PC
fabiensanglard.net/quake_pc/
(late 90s-style), it brings back so much memories đ!
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https://fabiensanglard.net/)'s
2 months ago
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I tested Pocket TTS from Kyutai. It's fun to use for generating French sentences: the accent is strong, but it's still perfectly understandable, even though French doesn't seem to be in the training dataset! Beyond that, the model is quite impressive especially knowing it has only 100M parameters
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GitHub - kyutai-labs/pocket-tts: A TTS that fits in your CPU (and pocket)
A TTS that fits in your CPU (and pocket). Contribute to kyutai-labs/pocket-tts development by creating an account on GitHub.
https://github.com/kyutai-labs/pocket-tts
2 months ago
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Extension pour soumettre une communication : deadline au 21 janvier 23:59 !
add a skeleton here at some point
2 months ago
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Les inscriptions aux journées MODE 2026 à Nice sont désormais ouvertes. Elles se dérouleront du 18 au 20 mars à l'HÎtel Saint-Paul. Les inscriptions sont ouvertes jusqu'au 1 mars (majoration > 9/02). La deadline pour soumettre une communication est le **15 janvier**.
3 months ago
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Mail annuel du CNRS pour savoir si tu as obtenu le prix Nobel â
3 months ago
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I am at
#NeurIPS2025
, reach out if you want to chat!
4 months ago
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reposted by
Samuel Vaiter
Transactions on Machine Learning Research
4 months ago
đ Finalist: Gradient Scarcity in Graph Learning with Bilevel Optimization, by Hashem GHANEM, Samuel Vaiter, Nicolas Keriven 5/n
openreview.net/forum?id=10Y...
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Gradient Scarcity in Graph Learning with Bilevel Optimization
Gradient scarcity emerges when learning graphs by minimizing a loss on a subset of nodes under the semi-supervised setting. It consists in edges between unlabeled nodes that are far from the...
https://openreview.net/forum?id=10YJTIsVYq
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reposted by
Samuel Vaiter
Fares El Khoury
4 months ago
Happy to be at
#NeurIPS
in San Diego to present our poster âLearning Theory for Kernel Bilevel Optimizationâ #3005, Fri at 4:30 p.m. Stop by/ping me to chat, especially about statistics, causality, generative models! Let's connect! Joint w/ E. Pauwels,
@samuelvaiter.com
,
@michael-arbel.bsky.social
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reposted by
Samuel Vaiter
Nicolas Keriven
4 months ago
I have several offers for Master internships / PhDs on graph ML funded by ERC MALAGA for 2026. Don't hesitate to contact me to apply! All infos here:
nkeriven.github.io/malaga/
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MALAGA: Reinventing the Theory of Machine Learning on Large Graphs (ERC StG)
https://nkeriven.github.io/malaga/
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Drame : je me suis gouré de bus à Massy et là je visite *toute* la startup-nation
5 months ago
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Est-ce que certain d'entre vous
#ESR
sont dans un laboratoire qui gÚre les missions / conférences avec un systÚme de ticket genre GLPI ou Jira ? Si oui, est-ce que c'est l'apocalypse ou plutÎt mieux qu'une gestion traditionnel ? Si non, quel niveau d'enthousiasme ou de dégout cela vous inspire ?
5 months ago
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Les journées SMAI-MODE 2026 auront lieu à Nice du 18 au 20 mars 2026, précédées par un mini-cours les 16/17. Vous pouvez déposer votre proposition de contrib sur
mode2026.sciencesconf.org
Inscription à partir du 1er décembre pour finir le 1 mars (avec un tarif majoré à compter du 1 février).
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Journées SMAI-MODE 2026 - Sciencesconf.org
Du 18 au 20 mars 2025, l'Université CÎte d'Azur accueille les journées SMAI-MODE, la conférence biennale du groupe MODE de la Société de Mathématiques Appliquées et Industrielles (SMAI).
https://mode2026.sciencesconf.org
5 months ago
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Now accepted to
#NeurIPS2025
, congrats to
@fareselkhoury.bsky.social
for his first ML paper!
add a skeleton here at some point
6 months ago
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Happy to share that I have been promoted to senior research scientist (directeur de recherche (*)) at
@cnrs.fr
effective today! Grateful to my amazing students, collaborators and mentors who made this journey possible. I will continue my research at the math lab of UniCA
@ljad-off.bsky.social
.
6 months ago
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Je viens de rĂ©aliser que mon employeur, sans me donner la possibilitĂ© d'acquĂ©rir un tĂ©lĂ©phone pro, exige une politique de sĂ©curitĂ© sur mon code de smartphone pour accĂ©der aux emails. Je viens donc de faire ce que j'aurai du faire il y a dix ans : enlever mes mails pros de mon tĂ©lĂ©phone perso đ€·ââïž
6 months ago
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Now accepted at
#NeurIPS2025
:)
add a skeleton here at some point
6 months ago
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reposted by
Samuel Vaiter
CNRS
6 months ago
#Communiqué
đïž La mĂ©daille d'or 2025 du CNRS est dĂ©cernĂ©e Ă StĂ©phane Mallat, mondialement reconnu pour ses travaux autour des mathĂ©matiques appliquĂ©es au traitement du signal et Ă lâintelligence artificielle. đ đ
cnrs.fr/fr/presse/en...
#TalentsCNRS
đ
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Sur le marché public de ma fac, il y a deux hotels de disponible paris intra-muros (1 mois et demi en avance). Et pas "deux" comme une maniÚre de dire peu, DEUX = D-E-U-X = 2. Putain de marché public à la con. Putain de rÚgles administratives à la con.
7 months ago
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20 years later I still love this city!
7 months ago
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reposted by
Samuel Vaiter
Nicolas Keriven
8 months ago
I'm BEYOND THRILLED to tell you that our first original song is now available on all platforms! Plz share if you like it đđŒđđŒđ Cheers
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Congratulations to Dr. Sophie Jaffard
@sophiejaffard.bsky.social
for a brillant PhD defense! We were very lucky with Patricia to have you as a PhD student, and I am sure that you will have a brillant career ahead.
8 months ago
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reposted by
Samuel Vaiter
Mathemarium (LJAD)
9 months ago
1/2 Julia Brun (M1) «ModĂšles particulaires de type Cucker-Smale et limites de champ moyen» gagne le prix K. Johnson đ avec un voyage Ă Paris et visite de la Maison PoincarĂ©
#parité
#maths
#Nice06
#fillesEtMaths
@cnrs-insmi.bsky.social
@univcotedazur.bsky.social
@cnrscotedazur.bsky.social
add a skeleton here at some point
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A reviewer in my batch submitted a review shorter than a tweet. wtf
9 months ago
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AWS chatbot is amazing. Q: I cant login neither I can reset my password because phone number verification is not working. A: If you cant reset your password, login into your account to reset your MFA.
9 months ago
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Expedition 33 might be overhyped. Let me add my contribution: This is an incredibile masterpiece.
9 months ago
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reposted by
Samuel Vaiter
Mathurin Massias
9 months ago
New paper on the generalization of Flow Matching
www.arxiv.org/abs/2506.03719
đ€Ż Why does flow matching generalize? Did you know that the flow matching target you're trying to learn *can only generate training points*? w
@quentinbertrand.bsky.social
@annegnx.bsky.social
@remiemonet.bsky.social
đđđ
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I am sure that the number of faculty follows the same curve /s
9 months ago
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Ma matinée
9 months ago
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reposted by
Samuel Vaiter
Romain Tavenard
9 months ago
It seems other authors* have just reached similar conclusions (large minibatches help for OT-CFM), using entropic-reg OT in place of our bilevel-sliced OT * Michal Klein, Alireza Mousavi-Hosseini, Stephen Zhang,
@marcocuturi.bsky.social
arxiv.org/abs/2506.05526
add a skeleton here at some point
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I wrote in my notes few years ago a *suboptimal* (and maybe wrong đ ) lower bounds of GD for smooth strongly convex function. Nesterov's proof uses seq w/ values in â^â (so infinite dimensional), whereas I do a similar strategy as in the convex case, ie in â^n 1/3
samuelvaiter.com/intro-to-low...
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Introduction to lower bounds in optimization | Samuel Vaiter
https://samuelvaiter.com/intro-to-lower-bounds/
9 months ago
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I play Expedition 33 in story mode, and found it not that easy (*). This evening, I launched the game and was impressed with myself because I was much better at parrying than usual. And then I saw the patch notes ... đ„Č (*) translation: I'm getting slaughtered.
9 months ago
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One of my papers with
@sophiejaffard.bsky.social
just turned one đ. No reviews yet, but Iâm sure the reviewers are carefully choosing every word (one per day).
9 months ago
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reposted by
Samuel Vaiter
Gabriel Peyré
10 months ago
Le prochain Data Science Colloquium à l'ENS, jeudi 12 juin, sera donné par David Louapre d'Ubisoft, "What modern AI and neuroscience can bring to non-playing characters in video games". David c'est bien sûr également le vulgarisateur scientifique de
www.youtube.com/scienceetonn...
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đŁ New preprint đŁ **Differentiable Generalized Sliced Wasserstein Plans** w/ L. Chapel
@rtavenar.bsky.social
We propose a Generalized Sliced Wasserstein method that provides an approximated transport plan and which admits a differentiable approximation.
arxiv.org/abs/2505.22049
1/5
10 months ago
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They say "emacs bankruptcy". I say Marie Kondo x dotemacs = â€ïž
10 months ago
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Most (?) misunderstood theorems in pop culture 1. Godel's incompleteness theorem 2. Curry-Howard correspondence 3. Universal approximation of neural networks
10 months ago
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reposted by
Samuel Vaiter
Gabriel Peyré
10 months ago
I have cleaned a bit my lecture notes on Optimal Transport for Machine Learners
arxiv.org/abs/2505.06589
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Optimal Transport for Machine Learners
Optimal Transport is a foundational mathematical theory that connects optimization, partial differential equations, and probability. It offers a powerful framework for comparing probability distributi...
http://arxiv.org/abs/2505.06589
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Convolution theorem: Fourier transform of the convolution of two functions (under suitable assumptions) is the product of the Fourier transforms of these two functions.
buff.ly/aOamDMF
11 months ago
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Dual numbers correspond to the completion of the real line with an nilpotent element Δ different from 0. It can be thought as a universal linearization of functions, or as the forward-mode of automatic differentiation.
buff.ly/vahZ0Fk
11 months ago
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Convergence of iterates does not imply convergence of the derivatives. Nevertheless, Gilbert (1994) proposed an interversion limit-derivative theorem under strong assumption on the spectrum of the derivatives.
buff.ly/MhK7qiI
11 months ago
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Leader-follower games, also known as Stackelberg games, are models in game theory where one player (the leader) makes a decision first, and the other player (the follower) responds, considering the leaderâs action. This is one the first instance of bilevel optimization.
11 months ago
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The Matrix Mortality Problem asks if a given set of square matrices can multiply to the zero matrix after a finite sequence of multiplications of elements. It is is undecidable for matrices of size 3x3 or larger.
buff.ly/lLmvvlo
11 months ago
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The SAT problem asks whether a logical formula, composed of variables and (AND, OR, NOT), can be satisfied by assigning True to the variables. SAT is NP-complete along with 3-SAT, with clauses of three literals, while 2-SAT, is in P!
buff.ly/mMLGbw4
11 months ago
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