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Jeffrey Negrea

5 accepted papers

2023

Concept Algebra for (Score-Based) Text-Controlled Generative Models

NeurIPS 2023poster

This paper concerns the structure of learned representations in text-guided generative models, focusing on score-based models. A key property of such models is that they can compose disparate concepts in a 'disentangled' manner.This suggests these models have internal representations that encode con…

2021

Minimax Optimal Quantile and Semi-Adversarial Regret via Root-Logarithmic Regularizers

NeurIPS 2021poster

Quantile (and, more generally, KL) regret bounds, such as those achieved by NormalHedge (Chaudhuri, Freund, and Hsu 2009) and its variants, relax the goal of competing against the best individual expert to only competing against a majority of experts on adversarial data. More recently, the semi-adve…

2020

In Defense of Uniform Convergence: Generalization via Derandomization with an Application to Interpolating Predictors

ICML 2020accepted

We propose to study the generalization error of a learned predictor in terms of that of a surrogate (potentially randomized) predictor that is coupled to $\hh$ and designed to trade empirical risk for control of generalization error. In the case where the learned predictor interpolates the data, it…

Cited by 74SourcePDFScholar
2020

Sharpened Generalization Bounds based on Conditional Mutual Information and an Application to Noisy, Iterative Algorithms

NeurIPS 2020poster

The information-theoretic framework of Russo and Zou (2016) and Xu and Raginsky (2017) provides bounds on the generalization error of a learning algorithm in terms of the mutual information between the algorithm's output and the training sample. In this work, we study the proposal, by Steinke and Za…

Cited by 125SourcePDFScholar
2019

Information-Theoretic Generalization Bounds for SGLD via Data-Dependent Estimates

NeurIPS 2019poster

In this work, we improve upon the stepwise analysis of noisy iterative learning algorithms initiated by Pensia, Jog, and Loh (2018) and recently extended by Bu, Zou, and Veeravalli (2019). Our main contributions are significantly improved mutual information bounds for Stochastic Gradient Langevin Dy…