The traveling salesman problem in graphs with 3-edge cutsets
Journal of the ACM (JACM)
SIAM Journal on Discrete Mathematics
Small travelling salesman polytopes
Mathematics of Operations Research
Decomposing 4-Regular Graphs into Triangle-Free 2-Factors
SIAM Journal on Discrete Mathematics
Combinatorial optimization
STOC '83 Proceedings of the fifteenth annual ACM symposium on Theory of computing
Finding maximum square-free 2-matchings in bipartite graphs
Journal of Combinatorial Theory Series B
Restricted b-matchings in degree-bounded graphs
IPCO'10 Proceedings of the 14th international conference on Integer Programming and Combinatorial Optimization
A simple algorithm for finding a maximum triangle-free 2-matching in subcubic graphs
Discrete Optimization
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A simple 2-matchingin an edge-weighted graph is a subgraph all of whose vertices have degree 1 or 2. We consider the problem of finding a maximum weight simple 2-matching that contains no triangles, which is closely related to a class of relaxations of the TSP. Our main results are, for graphs with maximum degree 3, a complete description of the convex hull of incidence vectors of triangle-free simple 2-matchings and a strongly polynomial time algorithm for the above problem. Our system requires the use of a type of comb inequality (introduced by Grötschel and Padberg for the TSP polytope) that has {0,1,2}-coefficients and hence is more general than the well-known blossom inequality used in Edmonds' characterization of the simple 2-matching polytope.