Author

Akshay Mishra

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Preprint Jul 2026

COBS: Cumulant Order Block Sparse Attention

COBS (Cumulant Order Block Sparse Attention), an attention method that builds on NSA, incorporating a novel selector that stores a compressed second-order statistic per block, which achieves lower position-wise negative log-likelihood (NLL) than dense attention in the authors' comparison.

Alexander Tian, Aditya Ghai, S. Neelam et al. · 1 citation · ⚡1