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On the facial structure of Symmetric and Graphical Traveling Salesman Polyhedra

机译:关于对称和图形旅行推销员多面体的面部结构

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摘要

The Symmetric Traveling Salesman Polytope S for a fixed number n of cities is a face of the corresponding Graphical Traveling Salesman Polyhedron P. This has been used to study facets of S using P as a tool. In this paper, we study the operation of "rotating" (or "lifting") valid inequalities for S to obtain a valid inequalities for P. As an application, we describe a surprising relationship between (a) the parsimonious property of relaxations of the Symmetric Traveling Salesman Polytope and (b) a connectivity property of the ridge graph of the Graphical Traveling Salesman Polyhedron.
机译:固定数量n个城市的对称旅行商多面体S是相应的图形旅行商多面体P的面。这已用于使用P作为工具研究S的面。在本文中,我们研究了S的“旋转”(或“提升”)有效不等式的操作,以获得P的有效不等式。作为应用,我们描述了(a)松弛的简约性质之间的令人惊讶的关系。对称的旅行推销员多面体和(b)图形旅行推销员多面体的脊图的连通性。

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