Navegando por Autor "Poggi, Marcus"
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Item Limited memory Rank-1 cuts for vehicle routing problems.(2017) Pecin, Diego Galindo; Pessoa, Artur Alves; Poggi, Marcus; Barboza, Eduardo Uchoa; Santos, Haroldo GambiniPecin et al. (2016) introduced a ‘‘limited memory’’ technique that allows an efficient use of Rank-1 cuts in the Set Partitioning Formulation of Vehicle Routing Problems, motivating a deeper investigation of those cuts. This work presents a computational polyhedral study that determines the best possible sets of multipliers for cuts with up to 5 rows. Experiments with CVRP instances show that the new multipliers lead to significantly improved dual bounds and contributes decisively for solving an open instance with 420 customers.