Olga Zaghen

@olgatticus.bsky.social

MSCA PhD student at AMLab with Erik Bekkers, interested in geometric deep learning, generative models and their intersection ๐ŸŒ โœจ bit.ly/olga-zaghen

Best lab in the most wonderful city: the perfect opportunity! Come join us ๐Ÿฆพ๐ŸŒŸ

Erik Bekkers@erikjbekkers.bsky.social ยท 4mo ago

We're looking for a new colleague at @amlab.bsky.social: Assistant Professor in AI for Science ๐Ÿ”ฌ๐Ÿค– World-class ML research, Amsterdam's thriving AI ecosystem (ELLIS, startups, big tech), and some of the best academic labor conditions in Europe โค๏ธ Deadline: May 30 ๐Ÿ‘‰ werkenbij.uva.nl/en/vacancies...

๐Ÿ”ฎ Working on ML on curved manifolds? Don't miss out on Jacobi Fields! ๐Ÿ”ฎ I wrote a quick, highly visual and hopefully accessible introduction to the topic: "Jacobi Fields in Machine Learning" ๐Ÿค  Check it out here: olgatticus.github.io/blog/jacobi-...!

Jacobi Fields in Machine Learning โ€” Olga Zaghen

An intuitive introduction to Jacobi fields and their applications in machine learning on Riemannian manifolds.

olgatticus.github.io

Interested in the analysis of GNN expressive power, limitations of the WL test or more in general in the definition of complete metrics on graphs? ๐Ÿ‘€ Check out this super cool work led by @martin.topology.rocks !๐Ÿ”ฅ

Martin Carrasco@martin.topology.rocks ยท 5mo ago

To kick off the PhD journey with @pseudomanifold.topology.rocks: What are the limitations of the WL metric, and what is an ๐˜ช๐˜ฏ๐˜ง๐˜ฐ๐˜ณ๐˜ฎ๐˜ข๐˜ต๐˜ช๐˜ท๐˜ฆ ๐˜ฎ๐˜ฆ๐˜ต๐˜ณ๐˜ช๐˜ค? We answer these questions with our ๐—š๐—ฟ๐—ฎ๐—ฝ๐—ต ๐—›๐—ผ๐—บ๐—ผ๐—บ๐—ผ๐—ฟ๐—ฝ๐—ต๐—ถ๐˜€๐—บ ๐——๐—ถ๐˜€๐˜๐—ผ๐—ฟ๐˜๐—ถ๐—ผ๐—ป arxiv.org/abs/2511.03068 @olgatticus.bsky.social, Kavir and @erikjbekkers.bsky.social

Variational Flow Matching goes Riemannian! ๐Ÿ”ฎ In this preliminary work, we derive a variational objective for probability flows ๐ŸŒ€ on manifolds with closed-form geodesics, and discuss some interesting results. Dream team: Floor, Alison & Erik (their @ below) ๐Ÿ’ฅ ๐Ÿ“œ arxiv.org/abs/2502.12981 ๐Ÿงต1/5

This is how it should be: one file, ctrl+c ctrl+v runnable from a notebook. I really do not want to mess with omegaconf, hydra or, the worst, a custom configuration system just to figure out how your model runs.

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If you are attending #NeurIPS2024๐Ÿ‡จ๐Ÿ‡ฆ, make sure to check out AMLab's 11 accepted papers ...and to have a chat with our members there! ๐Ÿ‘ฉโ€๐Ÿ”ฌ๐Ÿปโ˜• Submissions include generative modelling, AI4Science, geometric deep learning, reinforcement learning and early exiting. See the thread for the full list! ๐Ÿงต1 / 12

๐Ÿšจ Happening today! ๐Ÿšจ โฐ 4 PM CET / 10 AM EST ๐Ÿ‘ฉโ€๐Ÿ’ป Zoom link is in the link below ๐Ÿข You can attend in person in L3.36, Science Park, University of Amsterdam Join us for this exciting talk! :)

AMLab@amlab.bsky.social ยท 2y ago

Soon, @erikjbekkers.bsky.social and @davidmknigge.bsky.social will give a talk elaborating even further on geometry-grounded representation learning in a NeurReps seminar. Make sure to mark the date! :) โฐ November 21st, 4 PM CET ๐Ÿ”— www.neurreps.org/speaker-seri...

Yesterday, @erikjbekkers.bsky.social presented his vision on equivariance to IvI (at UvA), showcasing recent work on geometry-grounded representation learning - addressing fundamental limitations in geometric reasoning of current AI systems. ๐Ÿค– Exciting times ahead for geometric deep learning! ๐ŸŒ ๐Ÿคฉ

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