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10/10/2022
Optimal Eigenvalue Shrinkage in the Semicircle Limit
Recent studies of high-dimensional covariance estimation often assume th...
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06/03/2021
Neural Collapse Under MSE Loss: Proximity to and Dynamics on the Central Path
Recent work [Papyan, Han, and Donoho, 2020] discovered a phenomenon call...
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02/15/2021
On the Inability of the Higher Criticism to Detect Rare/Weak Departures
Consider a multiple hypothesis testing setting involving rare/weak featu...
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09/25/2020
ScreeNOT: Exact MSE-Optimal Singular Value Thresholding in Correlated Noise
We derive a formula for optimal hard thresholding of the singular value ...
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08/18/2020
Prevalence of Neural Collapse during the terminal phase of deep learning training
Modern practice for training classification deepnets involves a Terminal...
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07/03/2020
Two-sample Testing for Large, Sparse High-Dimensional Multinomials under Rare/Weak Perturbations
Given two samples from possibly different discrete distributions over a ...
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01/25/2019
Ambitious Data Science Can Be Painless
Modern data science research can involve massive computational experimen...
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10/17/2018