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cs.LG2026
Weak-to-Strong Learning in Decision Making
Jingwei Ji, Renyuan Xu
Many operational decisions rely on predictive models that estimate uncertain outcomes conditional on observable contexts. Training such models, however, often faces a fundamental d…
math.OC2026
Online Optimization of Difference-of-Convex Compositions with Smooth Mappings
Jingwei Ji, Jong-Shi Pang, Renyuan Xu
We study online optimization for a broad class of structured non-convex non-smooth problems where each loss is a composition of a difference-of-convex function with a smooth mappin…
cs.CC2026
Risk of Bad Tails: CVaR-Aware Pandora's Box and Prophet Inequalities
Jingwei Ji
We study Conditional Value-at-Risk (CVaR) variants of two canonical sequential decision problems: Pandora's box and the prophet inequality. For Pandora's box, the risk-aware proble…