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Nicolas Courty

@ncourty.bsky.social
224 followers 100 following 26 posts

Professor in Computer Science. Love and hate AI Optimal Transport Affinicionado Head of Obelix group @Irisa

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Reposted by Nicolas Courty
Clément Bonet @clement-bonet.bsky.social · 21/07/2026
Excited to announce that our workshop "Bridging Optimal Transport, Learning and Structured Data: Toward Geometric Distributional Learning" has been accepted at #NeurIPS2026 in Paris. ⏰Deadline: Aug 29, AoE 🔗Website with more informations: gddl-neurips-2026.github.io
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lebellig @lebellig.bsky.social · 21/07/2026
The last project of my PhD is finally out! 🪴 It was a pleasure collaborating with Aimi on this work! We introduce A²BM: Alignment-Aware Bridge Matching, a new framework for image-to-image translation with weakly aligned image pairs. Paper 📄: arxiv.org/pdf/2607.16294
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Nicolas Courty @ncourty.bsky.social · 24/06/2026
Tu ne seras pas le premier réfugié climatique ^^
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Nicolas Courty @ncourty.bsky.social · 24/06/2026
Of course il y a Vannes avec un certain nombre de personnes que tu connais déjà bien... Je ne vois même pas pourquoi tu poses la question. Et par les temps qui courent, une petite baignade dans le golfe....
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Nicolas Courty @ncourty.bsky.social · 19/06/2026
faisons phi des regards navrés qui nous guettent
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Nicolas Courty @ncourty.bsky.social · 19/06/2026
Rho, elle est bonne celle là
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Gabriel Peyré @gabrielpeyre.bsky.social · 16/06/2026
The alpha version of my new book "Optimal Transport for Machine Learners" is out, with in particular an online version with interactive figures www.gpeyre.com/ot4ml/
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Nicolas Courty @ncourty.bsky.social · 15/06/2026
La plupart de nos instances nous pousse à avoir une adoption massive de ces outils : c'est quelque chose que nous devrions d'abord questionner fortement à mon sens (et je ne dis pas que la réponse ne doit pas être qu'il faut y aller)
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Nicolas Courty @ncourty.bsky.social · 15/06/2026
On est beaucoup dans l'incantation (les autres le font, on doit le faire). Les budgets investis dans l'IA ne le sont pas ailleurs. Les risques dont on parle sont réels, je ne dis pas le contraire, mais pourquoi s'asseoir forcément sur cette branche avant de la scier ?
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Nicolas Courty @ncourty.bsky.social · 15/06/2026
Pour moi, l'exercice de la souveraineté dont on nous rabâche tant les oreilles, passerait d'abord par une souveraineté de choix (de l'utilisation ou non de ces modèles, dans l'appareil régalien par ex.). J'ai parfois l'impression qu'on ne questionne pas assez le pourquoi / ROI de l'IA.
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Nicolas Courty @ncourty.bsky.social · 15/06/2026
tout à fait, mais est ce que le dir cab en question a vraiment besoin d'un LLM pour faire son évaluation ? Est ce que la plus value dans l'utilisation de ce LLM vaut 1 milliard ? (vraie question, je ne dis pas que ce n'est pas le cas, ou que ce ne sera pas le cas dans le futur)
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Nicolas Courty @ncourty.bsky.social · 15/06/2026
Je débarque un peu comme ça au milieu de la discussion (très intéressante), sorry, mais à un moment, et vu les couts, ca veut peut être le coup de se poser sérieusement la question de l'intérêt d'avoir son modèle de fondation ? Un réacteur nucléaire produit de l'énergie au moins
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Clément Bonet @clement-bonet.bsky.social · 02/05/2026
Our work "Busemann Functions in the Wasserstein Space" was accepted at #AISTATS2026 This is a joint work with Elsa Cazelles, Lucas Drumetz and @ncourty.bsky.social. I will be presenting it tomorrow at the poster 96, see you there! Link: openreview.net/forum?id=Xpt...
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Nicolas Courty @ncourty.bsky.social · 01/04/2026
true that
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Nicolas Courty @ncourty.bsky.social · 01/04/2026
What about the DJ Kicks from Kruder and Dorfmeister ? Arf... seems from 1996....
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Reposted by Nicolas Courty
NeurIPS Conference @neuripsconf.bsky.social · 23/03/2026
Following the success of the EurIPS and NeurIPS-Mexico City pilots in 2025, we are thrilled to announce two official NeurIPS 2026 satellite events for this year! These will be held in Paris, France and Atlanta, USA, respectively, running alongside the main venue in Sydney, Australia.
neurips.cc
2025 Conference
The Thirty-Ninth Annual Conference on Neural Information Processing Systems
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Nicolas Courty @ncourty.bsky.social · 12/03/2026
saddest thing i've read today
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Nicolas Courty @ncourty.bsky.social · 16/02/2026
I see Sirat in poster... I hope this was your choice (assuming those are photos of a Cinema) !
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Rémi Flamary @rflamary.bsky.social · 06/02/2026
We are recruiting four positions connected to Machine Learning, Statistical Learning, and AI for Science in the Applied Mathematics department at École polytechnique. Join our vibrant community at IP Paris and Hi! Paris IA center. List below🧵 tinyurl.com/3jpw9t26
tinyurl.com
Calliopé
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Nicolas Courty @ncourty.bsky.social · 29/01/2026
Maybe it is also LLM generated ?
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Marianne Blanchard @mblanchard.bsky.social · 27/01/2026
"On meurt dans mon Université", par la présidente de l'Université Paul Valéry à Montpellier. Parce que les baisses de financement des universités ce sont aussi des conditions de travail si dégradées qu'elles en deviennent intenables
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Nicolas Courty @ncourty.bsky.social · 23/01/2026
beware of the abstract submission deadline !
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Nicolas Courty @ncourty.bsky.social · 27/12/2025
North Brittany ?
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ELLIS @ellis.eu · 19/12/2025
🏹 Job alert: 3 PhD positions in AI, Earth Observation, and Science-Policy interface 📍 Vannes 🇫🇷 & Ispra 🇮🇹 📅 Apply by Jan 15th 🔗 www-obelix.irisa.fr/job-offers
www-obelix.irisa.fr
Job offers – OBELIX
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Nicolas Courty @ncourty.bsky.social · 07/11/2025
One of those internships is on Gromov $\delta$-hyperbolicity for GNNs, and will be cosupervised together with Nicolas, myself and Laetitia Chapel. Take a look and spread the words !
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Nicolas Courty @ncourty.bsky.social · 05/11/2025
Halloween après l'heure
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Nicolas Courty @ncourty.bsky.social · 23/10/2025
so true....
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CNRS Sciences informatiques @cnrsinformatics.bsky.social · 08/10/2025
#Distinction 🏆| Charlotte Pelletier, lauréate d'une chaire #IUF, développe des méthodes d’intelligence artificielle appliquées aux séries temporelles d’images satellitaires. ➡️ www.ins2i.cnrs.fr/fr/cnrsinfo/... 🤝 @irisa-lab.bsky.social @cnrs-bretagneloire.bsky.social
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Nicolas Courty @ncourty.bsky.social · 23/09/2025
I love how they managed to distill the spirit of the first Alien movie. And the Eye creature .... !
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Nicolas Courty @ncourty.bsky.social · 18/09/2025
Huge fan too. Brace yourself for episode 5 ^^
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Nicolas Courty @ncourty.bsky.social · 07/09/2025
Trying hard to decouple my interest for the scientific questions behind AI and this....😮‍💨
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Reposted by Nicolas Courty
Olivia Guest · Ολίβια Γκεστ @olivia.science · 06/09/2025
Finally! 🤩 Our position piece: Against the Uncritical Adoption of 'AI' Technologies in Academia: doi.org/10.5281/zeno... We unpick the tech industry’s marketing, hype, & harm; and we argue for safeguarding higher education, critical thinking, expertise, academic freedom, & scientific integrity. 1/n
Abstract: Under the banner of progress, products have been uncritically adopted or
even imposed on users — in past centuries with tobacco and combustion engines, and in
the 21st with social media. For these collective blunders, we now regret our involvement or
apathy as scientists, and society struggles to put the genie back in the bottle. Currently, we
are similarly entangled with artificial intelligence (AI) technology. For example, software updates are rolled out seamlessly and non-consensually, Microsoft Office is bundled with chatbots, and we, our students, and our employers have had no say, as it is not
considered a valid position to reject AI technologies in our teaching and research. This
is why in June 2025, we co-authored an Open Letter calling on our employers to reverse
and rethink their stance on uncritically adopting AI technologies. In this position piece,
we expound on why universities must take their role seriously toa) counter the technology
industry’s marketing, hype, and harm; and to b) safeguard higher education, critical
thinking, expertise, academic freedom, and scientific integrity. We include pointers to
relevant work to further inform our colleagues.Figure 1. A cartoon set theoretic view on various terms (see Table 1) used when discussing the superset AI
(black outline, hatched background): LLMs are in orange; ANNs are in magenta; generative models are
in blue; and finally, chatbots are in green. Where these intersect, the colours reflect that, e.g. generative adversarial network (GAN) and Boltzmann machine (BM) models are in the purple subset because they are
both generative and ANNs. In the case of proprietary closed source models, e.g. OpenAI’s ChatGPT and
Apple’s Siri, we cannot verify their implementation and so academics can only make educated guesses (cf.
Dingemanse 2025). Undefined terms used above: BERT (Devlin et al. 2019); AlexNet (Krizhevsky et al.
2017); A.L.I.C.E. (Wallace 2009); ELIZA (Weizenbaum 1966); Jabberwacky (Twist 2003); linear discriminant analysis (LDA); quadratic discriminant analysis (QDA).Table 1. Below some of the typical terminological disarray is untangled. Importantly, none of these terms
are orthogonal nor do they exclusively pick out the types of products we may wish to critique or proscribe.Protecting the Ecosystem of Human Knowledge: Five Principles
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Melanie Mitchell @melaniemitchell.bsky.social · 18/08/2025
I always appreciate @cwarzel.bsky.social's takes on AI! 👀
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Reposted by Nicolas Courty
Rémi Flamary @rflamary.bsky.social · 27/06/2025
Distributional Reduction paper with H. Van Assel, @ncourty.bsky.social, T. Vayer , C. Vincent-Cuaz, and @pfrossard.bsky.social is accepted at TMLR. We show that both dimensionality reduction and clustering can be seen as minimizing an optimal transport loss 🧵1/5. openreview.net/forum?id=cll...
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Nicolas Courty @ncourty.bsky.social · 16/05/2025
A subtle combination of the three ? With a pinch of regrets about what could have been perfected ?
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Rémi Flamary @rflamary.bsky.social · 26/03/2025
We have been reworking the Quickstart guide of POT to show multiple examples of OT with the unified API that facilitates access to OT value/plan/potentials. It allows to select regularization/unbalancedness/lowrank/Gaussian OT with just a few parameters. pythonot.github.io/master/auto_...
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Nicolas Courty @ncourty.bsky.social · 22/03/2025
maybe, in the end, you are the innie @chriswolfvision.bsky.social ?
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Romain Tavenard @rtavenar.bsky.social · 04/02/2025
⚔️ One for all and all for one ⚔️ Efficient computation of PArtial Wasserstein distances on the Line (PAWL) is accepted to @iclr-conf.bsky.social Joint work with Laetitia Chapel: we introduce an 𝑂(𝑛 𝑙𝑜𝑔 𝑛) solver for partial Optimal Transport (OT) in 1D openreview.net/forum?id=kzE... 🧵 1/2
Solutions to the PAWL problem in 1D for different amounts of mass to be transported
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Reposted by Nicolas Courty
TMLR Published Papers @tmlr-pub.bsky.social · 19/01/2025
Slicing Unbalanced Optimal Transport Clément Bonet, Kimia Nadjahi, Thibault Sejourne, Kilian FATRAS, Nicolas Courty Action editor: Benjamin Guedj openreview.net/forum?id=AjJTg5M0r8 #transport #outliers #optimal
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Nicolas Courty @ncourty.bsky.social · 02/12/2024
Nice ! But no all the flow matching methods rely on an independent coupling, some use mini-batch OT also, see e.g. arxiv.org/abs/2304.14772 or arxiv.org/abs/2302.00482
arxiv.org
Multisample Flow Matching: Straightening Flows with Minibatch Couplings
Simulation-free methods for training continuous-time generative models construct probability paths that go between noise distributions and individual data samples. Recent works, such as Flow Matching,...
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Nicolas Courty @ncourty.bsky.social · 22/11/2024
Very grumpy here. Me ACing ICLR and reading the reviews
media.tenor.com
a little girl in a red and purple dress is holding a purple toy and making a funny face .
ALT: a little girl in a red and purple dress is holding a purple toy and making a funny face .
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