75 citations · 671 across the 41 of their papers we have counts for
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math.OC2018★ 2 cited
Equivariant Perturbation in Gomory and Johnson's Infinite Group Problem. VII. Inverse semigroup theory, closures, decomposition of perturbations
Robert Hildebrand, Matthias Köppe, Yuan Zhou
In this self-contained paper, we present a theory of the piecewise linear minimal valid functions for the 1-row Gomory-Johnson infinite group problem. The non-extreme minimal valid…
math.OC2018
Characterization and Approximation of Strong General Dual Feasible Functions
Matthias Köppe, Jiawei Wang
Dual feasible functions (DFFs) have been used to provide bounds for standard packing problems and valid inequalities for integer optimization problems. In this paper, the connectio…