Approximation hardness of graphic TSP on cubic graphs
Karpinski, Marek1 ; Schmied, Richard2
1 Deptartement of Computer Science and the Hausdorff Center for Mathematics, University of Bonn. Supported in part by DFG Grants and the Hausdorff Grant EXC59-1/2 
2 Deptartement of Computer Science, University of Bonn. Work supported by Hausdorff Doctoral Fellowship 
RAIRO - Operations Research - Recherche Opérationnelle, Tome 49 (2015) no. 4, pp. 651-668.

We prove explicit approximation hardness results for the Graphic TSP on cubic and subcubic graphs as well as the new inapproximability bounds for the corresponding instances of the (1,2)-TSP. The result on the Graphic TSP for cubic graphs is the first known inapproximability result on that problem. The proof technique in this paper uses new modular constructions of simulating gadgets for the restricted cubic and subcubic instances. The modular constructions used in the paper could be also of independent interest.

Reçu le :
Accepté le :
DOI : 10.1051/ro/2014062
Classification : 68W25, 68W40
Mots-clés : Traveling Salesman Problem, Approximability
Karpinski, Marek 1 ; Schmied, Richard 2

1 Deptartement of Computer Science and the Hausdorff Center for Mathematics, University of Bonn. Supported in part by DFG Grants and the Hausdorff Grant EXC59-1/2 
2 Deptartement of Computer Science, University of Bonn. Work supported by Hausdorff Doctoral Fellowship  
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Karpinski, Marek; Schmied, Richard. Approximation hardness of graphic TSP on cubic graphs. RAIRO - Operations Research - Recherche Opérationnelle, Tome 49 (2015) no. 4, pp. 651-668. doi : 10.1051/ro/2014062. http://archive.numdam.org/articles/10.1051/ro/2014062/

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