Search Results for author: Jongyeong Lee

Found 8 papers, 1 papers with code

Follow-the-Perturbed-Leader with Fréchet-type Tail Distributions: Optimality in Adversarial Bandits and Best-of-Both-Worlds

no code implementations8 Mar 2024 Jongyeong Lee, Junya Honda, Shinji Ito, Min-hwan Oh

In this paper, we establish a sufficient condition for perturbations to achieve $\mathcal{O}(\sqrt{KT})$ regrets in the adversarial setting, which covers, e. g., Fr\'{e}chet, Pareto, and Student-$t$ distributions.

Thompson Exploration with Best Challenger Rule in Best Arm Identification

no code implementations1 Oct 2023 Jongyeong Lee, Junya Honda, Masashi Sugiyama

This paper studies the fixed-confidence best arm identification (BAI) problem in the bandit framework in the canonical single-parameter exponential models.

Thompson Sampling

The Choice of Noninformative Priors for Thompson Sampling in Multiparameter Bandit Models

no code implementations28 Feb 2023 Jongyeong Lee, Chao-Kai Chiang, Masashi Sugiyama

Although the uniform prior is shown to be optimal, we highlight the inherent limitation of its optimality, which is limited to specific parameterizations and emphasizes the significance of the invariance property of priors.

Multi-Armed Bandits Thompson Sampling

Optimality of Thompson Sampling with Noninformative Priors for Pareto Bandits

no code implementations3 Feb 2023 Jongyeong Lee, Junya Honda, Chao-Kai Chiang, Masashi Sugiyama

In addition to the empirical performance, TS has been shown to achieve asymptotic problem-dependent lower bounds in several models.

Thompson Sampling

A Symmetric Loss Perspective of Reliable Machine Learning

no code implementations5 Jan 2021 Nontawat Charoenphakdee, Jongyeong Lee, Masashi Sugiyama

When minimizing the empirical risk in binary classification, it is a common practice to replace the zero-one loss with a surrogate loss to make the learning objective feasible to optimize.

BIG-bench Machine Learning Binary Classification +2

Learning Only from Relevant Keywords and Unlabeled Documents

no code implementations IJCNLP 2019 Nontawat Charoenphakdee, Jongyeong Lee, Yiping Jin, Dittaya Wanvarie, Masashi Sugiyama

We consider a document classification problem where document labels are absent but only relevant keywords of a target class and unlabeled documents are given.

Document Classification General Classification +1

Cannot find the paper you are looking for? You can Submit a new open access paper.