dual variable
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2021 ◽  
Vol 80 (2) ◽  
pp. 347-375
Author(s):  
Timotej Hrga ◽  
Janez Povh

AbstractWe present , a parallel semidefinite-based exact solver for Max-Cut, a problem of finding the cut with the maximum weight in a given graph. The algorithm uses the branch and bound paradigm that applies the alternating direction method of multipliers as the bounding routine to solve the basic semidefinite relaxation strengthened by a subset of hypermetric inequalities. The benefit of the new approach is a less computationally expensive update rule for the dual variable with respect to the inequality constraints. We provide a theoretical convergence of the algorithm as well as extensive computational experiments with this method, to show that our algorithm outperforms state-of-the-art approaches. Furthermore, by combining algorithmic ingredients from the serial algorithm, we develop an efficient distributed parallel solver based on MPI.


2021 ◽  
Vol 287 ◽  
pp. 116595
Author(s):  
Hassan Gharibpour ◽  
Farrokh Aminifar ◽  
Iman Rahmati ◽  
Arezou Keshavarz

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