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A note on the parameterized complexity of unordered maximum tree orientation

Sebastian Böcker ; Peter Damaschke (Institutionen för data- och informationsteknik, Datavetenskap, Algoritmer (Chalmers) ; Institutionen för data- och informationsteknik, Datavetenskap, Bioinformatik (Chalmers))
Discrete Applied Mathematics (0166-218X). Vol. 160 (2012), 10-11, p. 1634-1638.
[Artikel, refereegranskad vetenskaplig]

In the Unordered Maximum Tree Orientation problem, a set P of paths in a tree and a parameter k is given, and we want to orient the edges in the tree such that all but at most k paths in P become directed paths. This is a more difficult variant of a well-studied problem in computational biology where the directions of paths in P are already given. We show that the parameterized complexity of the unordered version is between Edge Bipartization and Vertex Bipartization, and we give a characterization of orientable path sets in trees by forbidden substructures, which are cycles of a certain kind.

Nyckelord: graph orientation, directed path, parameterized reduction, bipartization



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Denna post skapades 2012-05-11. Senast ändrad 2015-02-11.
CPL Pubid: 157545

 

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Generalized and fast search strategies for parameterized problems (VR//2010-4661)