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Monotone Lipschitz-Gradient Denoiser: Explainability of Operator Regularization Approaches and Convergence to Optimal Point
This paper addresses explainability of the operator-regularization approach under the use of monotone Lipschitz-gradient (MoL-Grad) denoiser -- an operator that can be expressed as the Lipschitz continuous gradient of a differentiable convex function. We prove that an operator is a MoL-Grad denoiser if and only if it is the ``single-valued'' …