Facet identification for the symmetric traveling salesman polytope
Mathematical Programming: Series A and B
New insertion and postoptimization procedures for the traveling salesman problem
Operations Research
The graphical relaxation: a new framework for the Symmetric Traveling Salesman Polytope
Mathematical Programming: Series A and B
A polyhedral approach to the asymmetric traveling salesman problem
Management Science
The Four-Day Aircraft Maintenance Routing Problem
Transportation Science
Heuristics for the black and white traveling salesman problem
Computers and Operations Research
Minimum cost path problems with relays
Computers and Operations Research
Solving shortest path problems with a weight constraint and replenishment arcs
Computers and Operations Research
Approximation algorithms for the black and white traveling salesman problem
COCOON'07 Proceedings of the 13th annual international conference on Computing and Combinatorics
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The black and white traveling salesman problem (BWTSP) is defined on a graph G whose vertex set is partitioned into black and white vertices. The aim is to design a shortest Hamiltonian tour on G subject to cardinality and length constraints: both the number of white vertices as well as the length of the tour between two consecutive black vertices are bounded above. The BWTSP has applications in airline scheduling and in telecommunications. This paper proposes an integer linear formulation for the undirected BWTSP, as well as several classes of valid inequalities. An exact branch-and-cut algorithm is then developed. Extensive tests show that it can solve exactly instances involving up to 100 vertices. The algorithm can also be applied directly to solve unit demand vehicle routing problems of similar sizes.