Centers in line graphs
Martin Knor, Ľudovít Niepel, Ľubomír Šoltés (1993)
Mathematica Slovaca
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Martin Knor, Ľudovít Niepel, Ľubomír Šoltés (1993)
Mathematica Slovaca
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Bachl, S., Brandenburg, F.-J., Gmach, D. (2004)
Journal of Graph Algorithms and Applications
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This paper studies the computational complexity of the problem (), when the input graph is a colored caterpillar, parameterized by hair length. In order prove our result we establish a close relationship between the and a graph layout problem the (). We show a dichotomy: the and the are NP-complete for colored caterpillars of hair length 2, while both problems are in P for colored caterpillars of hair length 2. For the hardness results we provide a reduction from the , while the...
Samuel Jezný, Marián Trenkler (1983)
Czechoslovak Mathematical Journal
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