ML Researcher at LawZero. Causality, identifiable representation learning & AI safety. Previously at SAIL Montreal (Samsung), @Mila_Quebec & @UMontrealDIRO
Montréal, CA
Joined March 2016
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1/ Excited for our oral presentation at #NeurIPS2023 on "Additive Decoders for Latent Variables Identification and Cartesian-Product Extrapolation"!
A theoretical paper about object-centric representation learning (OCRL), disentanglement & extrapolation
arxiv.org/abs/2307.02598
Today is my last day as a member of Samsung AI Lab, Montreal (SAIL).
A huge "thank you" to this amazing team who taught me so much during the past three years. SAIL is a truly unique environment to do research. I wish all the best to the lab and its members!
Presenting our work at ICML this week! Come and say hi!
On the Sample Efficiency of Inverse Dynamics Models for Semi-Supervised Imitation Learning
Poster: Wed, Jul 8, 10:30 AM KST, HALL A # 508
Action labels for BC are not cheap. Semi-supervised methods use Inverse Dynamics Models (IDMs) to fix this, but why does IDM learning actually outperform BC in this context?
Our #ICML2026 paper answers this! 🇰🇷
📜 Paper: arxiv.org/abs/2602.02762
🧵
I had a lot of fun meeting all the smart people at this workshop and presenting my work "On the Identifiability of Latent Action Policies" as an oral! A huge thanks to the organizers!
Paper: arxiv.org/abs/2510.01337
What an awesome first day! Thank you all for joining and listening to our amazing speakers: @SchmidhuberAI, @sherryyangML, @cosmo_shirley, @Yoshua_Bengio, @ylecun, @mido_assran
World Models have beautiful days ahead. This is just the beginning 🫡
Congratulations to my colleague at Samsung @jm_alexia for winning the ARC Prize 2025 Paper Award! 1st place! Well deserved! This is a BIG deal :)
ARC Prize 2025 Paper Award Winners
1st / "Less is More: Recursive Reasoning with Tiny Networks" (TRM) / A. Jolicoeur-Martineau / $50k
2nd / "Self-Improving Language Models for Evolutionary Program Synthesis: A Case Study on ARC-AGI" (SOAR) / J. Pourcel et al. / $20k
3rd / "ARC-AGI Without Pretraining" / I. Liao et al. / $5k
Sébastien Lachapelle retweeted
ARC Prize 2025 Paper Award Winners
1st / "Less is More: Recursive Reasoning with Tiny Networks" (TRM) / A. Jolicoeur-Martineau / $50k
2nd / "Self-Improving Language Models for Evolutionary Program Synthesis: A Case Study on ARC-AGI" (SOAR) / J. Pourcel et al. / $20k
3rd / "ARC-AGI Without Pretraining" / I. Liao et al. / $5k
🚨I have received the "Best Thesis Award 2025" from the Université de Montréal in the "Natural Sciences and Engineering" category! 🚨
Thesis:
umontreal.scholaris.ca/items…
Thesis defense:
youtube.com/watch?v=Wza3sfDt…
Explainer for a wide audience (in French):
youtube.com/watch?v=KD3cHdkg…
My thesis is now online!
umontreal.scholaris.ca/items…
This is more than just a list of publications. I invested a lot of time and passion writing this thesis in hope that it will make for an interesting read.
Here's a summary of what you'll find in it.
Link to official announcement, in French: nouvelles.umontreal.ca/artic…
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Sébastien Lachapelle retweeted
Finally published:
“Top-down and bottom-up neuroscience: overcoming the clash of research cultures”
nature.com/articles/s41...
Looking for ways to better understand different neuroscientific perspectives and enable productive collaborations
If you're at ICML on Saturday, check out our workshop paper on identifiable steering from multi-concept shifts in language models!
I will be at the Actionable Interpretability Workshop (@ActInterp, #ICML) presenting *SSAEs* in the East Ballroom A from 1-2pm.
Drop by (or send a DM) to chat about (actionable) interpretability, (actionable) identifiability, and everything in between!
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My thesis is now online!
umontreal.scholaris.ca/items…
This is more than just a list of publications. I invested a lot of time and passion writing this thesis in hope that it will make for an interesting read.
Here's a summary of what you'll find in it.
This would not have been possible without my amazing supervisor @SimonLacosteJ and my great coauthors: @_kurowasan @TristanDeleu @divyat09 @Qu3ntinB @alexandredrouin @alex_lacoste_ @prlz77 @yash_j_sharma @_katieeverett @bouzoukipunks @Yoshua_Bengio & Rémi Le Priol
Oh and in case some of you are interested, my thesis defense is available here: youtube.com/watch?v=Wza3sfDt…
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