Abstract

We establish local convergence results for a generic algorithmic framework for solving a wide class of equality constrained optimization problems. The framework is based on applying a splitting scheme to the augmented Lagrangian function that includes as a special case the well-known alternating direction method of multipliers (ADMM). Our local convergence analysis is free of the usual restrictions on ADMM-like methods, such as convexity, block separability or linearity of constraints. It offers a much-needed theoretical justification to the widespread practice of applying ADMM-like methods to nonconvex optimization problems.

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