Owen Marschall
Postdoc in the Litwin-Kumar lab at the Center for Theoretical Neuroscience at Columbia University.
I'm interested in multi-tasking and dimensionality.
- 1/X Excited to present this preprint on multi-tasking, with @david-g-clark.bsky.social and Ashok Litwin-Kumar! Timely too, as “low-D manifold” has been trending again. (If you read thru the end, we escape Flatland and return to the glorious high-D world we deserve.) www.biorxiv.org/content/10.6...
- 2/X Recent experimental evidence and compelling Bluesky posts are complicating the low-D manifold story—not that it isn’t true when measured in the context of of a single, low-complexity task, as Gao et al. (biorxiv 2017) argue pretty much has to happen...
- 3/X ... but that there seem to be different manifolds that the network state occupies depending on what task is performed (Sabatini et al. Nat Comm 2024, Borgognon et al. Nat Comm 2025).
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View full thread37/X Overall, really enjoyed working on this with @david-g-clark.bsky.social and Ashok, and I’d love to chat about any part of it—the details behind the theory, the experimental implications, etc. Thanks for reading!
- Can confirm this was a fun project! My favorite takeaway is that the (low-but-extensive) rank of a network can be used as a knob for controlling dimensionality while leaving single-neuron properties unchanged.
