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O(1/t) complexity analysis of the generalized alternating direction method of multipliers

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Abstract

Owing to its efficiency in solving some types of large-scale separable optimization problems with linear constraints, the convergence rate of the alternating direction method of multipliers (ADMM for short) has recently attracted significant attention. In this paper, we consider the generalized ADMM (G-ADMM), which incorporates an acceleration factor and is more efficient. Instead of using a solution measure that depends on a bounded set and cannot be easily estimated, we propose using the original ϵ-optimal solution measure, under which we prove that the G-ADMM converges at a rate of O(1/t). The new bound depends on the penalty parameter and the distance between the initial point and solution set, which is more reasonable than the previous bound.

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Acknowledgements

This work was supported by a Project Funded Priority Academic Program Develop- ment of Jiangsu Higher Education Institutions of Jiangsu Higher Education Institutions, National Natural Sci- ence Foundation of China (Grant Nos. 11401315, 11625105, 11171159 and 11431102) and the National Science Foundation from Jiangsu Province (Grant No. BK20140914). The authors thank the referees for their constructive comments and suggestions, which helped us improve the paper greatly.

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Correspondence to Deren Han.

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Cai, X., Han, D. O(1/t) complexity analysis of the generalized alternating direction method of multipliers. Sci. China Math. 62, 795–808 (2019). https://doi.org/10.1007/s11425-016-9184-4

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  • DOI: https://doi.org/10.1007/s11425-016-9184-4

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