5473 search results - page 218 / 1095 » On the graph isomorphism problem |
187
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DAM
2010
15 years 7 months ago
2010
We study P6-free graphs, i.e., graphs that do not contain an induced path on six vertices. Our main result is a new characterization of this graph class: a graph G is P6-free if an...
204
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CORR
2007
Springer
15 years 7 months ago
2007
Springer
An edge-colored directed graph is observable if an agent that moves along its edges is able to determine his position in the graph after a sufficiently long observation of the edge...
191
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CVPR
2007
IEEE
16 years 9 months ago
2007
IEEE
Many vision tasks are posed as either graph partitioning (coloring) or graph matching (correspondence) problems. The former include segmentation and grouping, and the latter inclu...
224
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STOC
2010
ACM
16 years 2 days ago
2010
ACM
We give the first polynomial-time approximation scheme (PTAS) for the Steiner forest problem on planar graphs and, more generally, on graphs of bounded genus. As a first step, w...
162
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STOC
2002
ACM
16 years 7 months ago
2002
ACM
The Minimum Vertex Cover problem is the problem of, given a graph, finding a smallest set of vertices that touches all edges. We show that it is NP-hard to approximate this proble...