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Ying-Zhi Tang

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Preprint Aug 2026

Intrinsic Interaction Geometry Controls the Low-Rank Complexity of Softmax Attention

How much matrix rank is required to preserve every bounded value output of normalized softmax attention? We study the unrestricted maximum-row-\(\ell_1\) approximation rank \(r_\varepsilon(A)\), exactly the least rank achieving uniform error over all bounded vector-valued values. Row softmax exposes the intrinsic inter...

Yupei Sui, Jia-Ning Zhang, Ying-Zhi Tang · 1 citation

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