Takanobu Furuhashi

WEEP: A Differentiable Nonconvex Sparse Regularizer via Weakly-Convex Envelope

Sparse regularization is fundamental in signal processing and feature extraction but often relies on non-differentiable penalties, conflicting with gradient-based optimizers. We propose WEEP (Weakly-convex Envelope of Piecewise Penalty), a novel differentiable regularizer derived from the weakly-con…