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Junpei Komiyama

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#machine learning Preprint Oct 2026

Accelerating Linear Bandits with Persistent Candidate Sets

Exhaustive optimistic scoring can make action selection costly in linear bandits with a large fixed set of $K$ actions, requiring $\mathcal{O}(K)$ score evaluations per round. We introduce Persistent Candidate LinUCB (\textsc{PC-LinUCB}), which maintains $k$ active actions and samples $q$ challengers uniformly from the...

Bing-Kui Tong, Daria Korovaitceva, M. Sheshukova et al. · 0 citations
#artificial intelligence Review Sep 2026

Self-Adapting Group of Experts for Multi-Agent Reasoning

This work introduces SAGE (Self-Adapting Group of Experts), a training-free framework that uses answer agreement, prefix consistency, and reciprocal peer review to select a strategy donor and transfers the selected donor's reasoning strategy to the other agents while preserving their original roles.

Mohammad Atif Quamar, Nurbek Tastan, Karthik Nandakumar et al. · 0 citations
Jul 2026

Learning Optimal Dynamic Matching via Graph Neural Networks

The results show that residual-graph value learning yields state-dependent dynamic matching policies that adapt to realized connectivity and exit information.

Genta Okada, Shunya Noda, Junpei Komiyama et al. · 0 citations
Preprint Aug 2026

Prefix-Denoising Consistency: Test-Time Verification for Diffusion Language Models

PDC consistently improves upon the initial sample, outperforms independent generations under a computational constrained comparison, and is robust to different unmasking strategies and parameter settings, highlighting prefix-conditioned regeneration as an effective DLM-specific primitive for test-time verification.

Yuki Ichihara, Naoto Iwase, Mohammad Atif Quamar et al. · 0 citations
Preprint Aug 2026

Privileged Solutions or Context-Induced Teacher Behavior? Dissecting On-Policy Self-Distillation

The role of target-specific privilege is investigated with On-Policy Self-Distillation from Other Problems (On-Policy Self-Distillation from Other Problems), which replaces the paired reference with a problem and solution from a different example, while preserving the student rollout, teacher, and distillation objectiv...

Yuki Ichihara, Naoto Iwase, Mohammad Atif Quamar et al. · 9 citations · ⚡3

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