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• W2962989062 abstract "In this paper, we focus on solving a distributed convex optimization problem in a network, where each agent has its own convex cost function and the goal is to minimize the sum of the agents' cost functions while obeying the network connectivity structure. In order to minimize the sum of the cost functions, we consider a new distributed gradient-based method where each node maintains two estimates, namely, an estimate of the optimal decision variable and an estimate of the gradient for the average of the agents' objective functions. From the viewpoint of an agent, the information about the decision variable is pushed to the neighbors, while the information about the gradients is pulled from the neighbors (hence giving the name “push-pull gradient method”). The method unifies the algorithms with different types of distributed architecture, including decentralized (peer-to-peer), centralized (master-slave), and semi-centralized (leader-follower) architecture. We show that the algorithm converges linearly for strongly convex and smooth objective functions over a directed static network. In our numerical test, the algorithm performs well even for time-varying directed networks." @default.
• W2962989062 created "2019-07-30" @default.
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• W2962989062 date "2018-12-01" @default.
• W2962989062 modified "2023-09-27" @default.
• W2962989062 title "A Push-Pull Gradient Method for Distributed Optimization in Networks" @default.
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• W2962989062 doi "https://doi.org/10.1109/cdc.2018.8619047" @default.
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