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ZONE: Zeroth-Order Nonconvex Multiagent Optimization Over Networks
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DOI：10.1109/TAC.2019.2896025.png)
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Abstract
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In this paper, we consider distributed optimization problems over a multiagent network, where each agent can only partially evaluate the objective function, and it is allowed to exchange messages with its immediate neighbors. Differently from all existing works on distributed optimization, our focus is given to optimizing a class of nonconvex problems and under the challenging setting, where each agent can only access the zeroth-order information (i.e., the functional values) of its local functions. For different types of network topologies, such as undirected connected networks or star networks, we develop efficient distributed algorithms and rigorously analyze their convergence and rate of convergence (to the set of stationary solutions). Numerical results are provided to demonstrate the efficiency of the proposed algorithms.
Keywords:
Distributed optimization
nonconvex optimization
primal-dual algorithms
zeroth-order information
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