A variable smoothing method for DC composite optimization is proposed for robust phase retrieval, with convergence to DC critical points and experiments indicating better outlier robustness than ℓ1 loss.
Understanding notions of stationarity in nonsmooth optimization: A guided tour of various constructions of subdifferential for nonsmooth functions
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A DC Composite Optimization via Variable Smoothing for Robust Phase Retrieval with Nonconvex Loss Functions
A variable smoothing method for DC composite optimization is proposed for robust phase retrieval, with convergence to DC critical points and experiments indicating better outlier robustness than ℓ1 loss.