Equivariant Perturbation in Gomory and Johnson’s Infinite Group Problem. II. The Unimodular Two-Dimensional Case Published: 2012/10/24 Amitabh BasuRobert HildebrandMatthias KöppeCategories Cutting Plane Approaches Tags cutting planes, infinite group problem, integer programming Short URL: https://optimization-online.org/?p=12206 We give an algorithm for testing the extremality of a large class of minimal valid functions for the two-dimensional infinite group problem. ArticleDownload View PDF