Theoretical Investigations and Practical Enhancements on Tail Task Risk Minimization in Meta Learning

• URL: http://arxiv.org/abs/2410.22788v1
• Date: Wed, 30 Oct 2024 08:07:43 GMT
• Title: Theoretical Investigations and Practical Enhancements on Tail Task Risk Minimization in Meta Learning
• Authors: Yiqin Lv, Qi Wang, Dong Liang, Zheng Xie,
• Abstract summary: Recent advances have examined the effectiveness of tail task risk minimization in fast adaptation robustness improvement citepwang2023simple. We reduce the distributionally robust strategy to a max-min optimization problem, constitute the Stackelberg equilibrium as the solution concept, and estimate the convergence rate.
• Score: 9.399647354904026
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Meta learning is a promising paradigm in the era of large models and task distributional robustness has become an indispensable consideration in real-world scenarios. Recent advances have examined the effectiveness of tail task risk minimization in fast adaptation robustness improvement \citep{wang2023simple}. This work contributes to more theoretical investigations and practical enhancements in the field. Specifically, we reduce the distributionally robust strategy to a max-min optimization problem, constitute the Stackelberg equilibrium as the solution concept, and estimate the convergence rate. In the presence of tail risk, we further derive the generalization bound, establish connections with estimated quantiles, and practically improve the studied strategy. Accordingly, extensive evaluations demonstrate the significance of our proposal and its scalability to multimodal large models in boosting robustness.

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