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Issei Sato

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#artificial intelligence Preprint Apr 2026

Understanding Scattered Forest Search: A Version-Space Perspective on Multi-Turn Program Correction

The theoretical analysis of SFS reveals that SFS exhibits behavior closer to IRRI than to Line, and these results suggest that a simpler method, IRRI, may achieve a similar refinement process without relying on the complex correction mechanism of SFS.

Yuto Tanaka, Issei Sato · 0 citations

Max-pooling Network Revisited: Analyzing the Role of Semantic Probability in Multiple Instance Learning for Hallucination Detection

This work revisits classical sentence classification models from a margin enlargement perspective, aggregating token-level features via max pooling and directly estimating sentence scores using a lightweight MLP, and achieves substantial efficiency improvements while maintaining competitive performance with state-of-th...

Shota Fujikawa, Issei Sato · 0 citations
#machine learning Preprint Sep 2026

Understanding LLM Quantization through Activation-Guided Compensation and Orthogonal Residuals

Practical guidelines for applying randomized Hadamard rotation, sign selection, and channel scaling are derived, which explain how random signs suppress constructive interference among persistent outlier channels, how sampling multiple sign patterns can improve transformation selection, and how second-moment balancing...

Yamato Narita, Issei Sato · 0 citations
#artificial intelligence Preprint Jan 2025

Gradient Heterogeneity Complements Hessian Heterogeneity in Transformer Optimization

This study provides a theoretical analysis showing that gradient heterogeneity, together with Hessian heterogeneity, degrades the convergence of gradient-based methods such as SGD, while sign-based methods are substantially less sensitive to this effect.

Akiyoshi Tomihari, Issei Sato · 6 citations · ⚡1

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