A deterministic single-loop cubic regularized Newton method for NCSC bilevel optimization that attains the optimal O(ε^{-1.5}) SOSP rate without repeated lower-level solves.
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On Second-Order Methods for Bilevel Optimization
A deterministic single-loop cubic regularized Newton method for NCSC bilevel optimization that attains the optimal O(ε^{-1.5}) SOSP rate without repeated lower-level solves.