2026
Towards Nonlinear Sparse AUC Maximization via Compositional Stochastic Hard Thresholding
AAAI 2026technical
The Area Under the ROC Curve (AUC) is an important evaluation metric for both linear and, in particular, nonlinear classification models, owing to its robustness against class imbalance. Sparse learning with an ℓ₀ constraint can enhance model interpretability and generalization. Prior work has shown