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05/25/2023
Don't Retrain, Just Rewrite: Countering Adversarial Perturbations by Rewriting Text
Can language models transform inputs to protect text classifiers against...
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03/07/2022
Cascaded Gaps: Towards Gap-Dependent Regret for Risk-Sensitive Reinforcement Learning
In this paper, we study gap-dependent regret guarantees for risk-sensiti...
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11/06/2021
Exponential Bellman Equation and Improved Regret Bounds for Risk-Sensitive Reinforcement Learning
We study risk-sensitive reinforcement learning (RL) based on the entropi...
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06/30/2020
Dynamic Regret of Policy Optimization in Non-stationary Environments
We consider reinforcement learning (RL) in episodic MDPs with adversaria...
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06/22/2020
Risk-Sensitive Reinforcement Learning: Near-Optimal Risk-Sample Tradeoff in Regret
We study risk-sensitive reinforcement learning in episodic Markov decisi...
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04/21/2019
Achieving the Bayes Error Rate in Synchronization and Block Models by SDP, Robustly
We study the statistical performance of semidefinite programming (SDP) r...
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03/17/2018
Hidden Integrality of SDP Relaxation for Sub-Gaussian Mixture Models
We consider the problem of estimating the discrete clustering structures...
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05/23/2017