1 code implementation • 25 Feb 2025 • Victor Geadah, Amin Nejatbakhsh, David Lipshutz, Jonathan W. Pillow, Alex H. Williams
Neural population activity exhibits complex, nonlinear dynamics, varying in time, over trials, and across experimental conditions.
no code implementations • 19 Dec 2024 • Amin Nejatbakhsh, Victor Geadah, Alex H. Williams, David Lipshutz
Biological and artificial neural systems form high-dimensional neural representations that underpin their computational capabilities.
no code implementations • 30 Jun 2020 • Gonzalo Mena, Amin Nejatbakhsh, Erdem Varol, Jonathan Niles-Weed
We study Sinkhorn EM (sEM), a variant of the expectation maximization (EM) algorithm for mixtures based on entropic optimal transport.
no code implementations • 7 Dec 2019 • Erdem Varol, Amin Nejatbakhsh, Conor McGrory
Motion segmentation for natural images commonly relies on dense optic flow to yield point trajectories which can be grouped into clusters through various means including spectral clustering or minimum cost multicuts.
no code implementations • 23 Oct 2019 • Erdem Varol, Amin Nejatbakhsh
In this paper, we expand upon the theory of trend filtering by introducing the use of the Wasserstein metric as a means to control the amount of spatiotemporal variation in filtered time series data.
no code implementations • pproximateinference AABI Symposium 2019 • Gonzalo Mena, Erdem Varol, Amin Nejatbakhsh, Eviatar Yemini, Liam Paninski
This problem is known to quickly become intractable as the size of the permutation increases, since its involves the computation of the permanent of a matrix, a #P-hard problem.
no code implementations • 1 Jun 2019 • Amin Nejatbakhsh, Erdem Varol
Previous theoretical analysis of the problem has been done in a setting where the responses are a complete permutation of the regressed covariates.