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Author

John C. Duchi

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#machine learning Preprint Sep 2026

How Reusable Are Benchmarks with Richer Feedback?

We study whether benchmarks reliably guide model selection as developers adapt to evaluation feedback across multiple criteria. We find that the worst-case test-set size needed to estimate the best score among $k$ adaptively chosen models, under any convex combination of the criteria, grows exponentially with the numbe...

Youssef Allouah, John C. Duchi · 0 citations
Jul 2026

Finding a stationary point of a stochastic convex problem

We consider the problem of finding stationary points for stochastic convex optimization problems. Rather than surrogates to stationarity, such as a proximity-to-stationarity guarantee or small gradient of the Moreau envelope, we ask for a stronger notion: that the subdifferential of the objective actually contains a sm...

Felipe Areces, John C. Duchi, Malo Sommers · 2 citations

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