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Qi-Hao Zhou

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#machine learning Preprint Sep 2026

Tight Stochastic Condition-Number Dependence in Nonconvex-Strongly-Concave Minimax Optimization

We study whether the linear condition-number dependence in the stochastic complexity of SAPD+ is necessary for nonconvex-strongly-concave minimax optimization. For jointly $L$-smooth objectives with dual strong-concavity parameter $\mu$, we prove a lower bound that matches the SAPD+ upper bound under the same Moreau-en...

Qi-Hao Zhou · 1 citation