2 papers
stat.ML2026
Semiparametric Efficient Bilevel Gradient Estimation
Fares El Khoury, Houssam Zenati, Nathan Kallus +2
Functional bilevel methods estimate a lower-level function and plug it into a hypergradient, but this plug-in gradient can retain first-order bias when the lower-level problem is l…
cs.LG2025
Learning Theory for Kernel Bilevel Optimization
Fares El Khoury, Edouard Pauwels, Samuel Vaiter +1
Bilevel optimization has emerged as a technique for addressing a wide range of machine learning problems that involve an outer objective implicitly determined by the minimizer of a…