77 search results - page 8 / 16 » Contractions of Planar Graphs in Polynomial Time |
FOCS
2009
IEEE
15 years 6 months ago
2009
IEEE
Polynomial time preprocessing to reduce instance size is one of the most commonly deployed heuristics to tackle computationally hard problems. In a parameterized problem, every in...
CORR
2010
Springer
14 years 8 months ago
2010
Springer
In the oblivious buy-at-bulk network design problem in a graph, the task is to compute a fixed set of paths for every pair of source-destination in the graph, such that any set of ...
ESA
2004
Springer
15 years 5 months ago
2004
Springer
Edge contraction is shown to be a useful mechanism to improve lower bound heuristics for treewidth. A successful lower bound for treewidth is the degeneracy: the maximum over all ...
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CSR
2009
Springer
15 years 6 months ago
2009
Springer
The 2-Disjoint Connected Subgraphs problem asks if a given graph has two vertex-disjoint connected subgraphs containing prespecified sets of vertices. We show that this problem is...
MFCS
2007
Springer
15 years 5 months ago
2007
Springer
Suppose we are given a graph G together with two proper vertex k-colourings of G, α and β. How easily can we decide whether it is possible to transform α into β by recolouring...