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#machine learning Preprint Sep 2026

Block Sparse Attention with Log-Linear Complexity

Scaling language models to long contexts is limited by the quadratic cost of self-attention. Block sparse attention offers an efficient alternative, but selecting the retained blocks remains a bottleneck. Conventional block selection requires scoring all query-block pairs and therefore remains quadratic in sequence len...

Bo-Hao Tang, Zhen Qin, Yu-Qi Pan et al. · 0 citations
Preprint Aug 2026

TsuGO: Probing Search Efficiency in LLM Reasoning via Go Life-and-Death Problems

The evaluation of LLM reasoning is moving from final-answer accuracy to process-level assessment, yet existing methods still fail to capture how models plan reasoning paths and allocate reasoning resources--that is, how they organize search. Prior process-level methods focus on the coherence and redundancy of chain-of-...

Shunwen Bai, Ziping Ma, Chaoyang Zhang et al. · 0 citations
Preprint Aug 2026

Modular TTT: Rethinking Test-Time Training as Composable Modules

Test-time training (TTT) views sequence modeling as an online learning problem in which fast weights are updated by an internal learning rule. Despite the growing number of TTT variants, existing approaches typically hard-code each variant separately, which makes it difficult to design new TTT methods and to isolate th...

Bohao Tang, Zhen Qin, Yuqi Pan et al. · 1 citation
#machine learning Preprint Aug 2026

LoGo: Token-Level Dynamic Local-Global Attention

LoGo, a token-level dynamic local-global attention mechanism that uses attention span as a direct proxy for attention budget allocation, is proposed and results suggest that learned token-level span allocation is an effective and scalable way to improve the long-context performance-compute trade-off.

Yu-Qi Pan, Zheng Li, Bo-Hao Tang et al. · 1 citation

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