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» Graph Isomorphism is in SPP
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CSR
2009
Springer
14 years 2 months ago
On the Complexity of Matroid Isomorphism Problems
We study the complexity of testing if two given matroids are isomorphic. The problem is easily seen to be in Σp 2 . In the case of linear matroids, which are represented over poly...
B. V. Raghavendra Rao, Jayalal M. N. Sarma
MFCS
2007
Springer
14 years 1 months ago
Hardness Results for Tournament Isomorphism and Automorphism
A tournament is a graph in which each pair of distinct vertices is connected by exactly one directed edge. Tournaments are an important graph class, for which isomorphism testing ...
Fabian Wagner
AMAI
2004
Springer
14 years 26 days ago
Symmetry Breaking in Constraint Satisfaction with Graph-Isomorphism: Comma-Free Codes
In this paper the use of graph isomorphism is investigated within the framework of symmetry breaking in constraint satisfaction problems. A running example of Comma-free codes is ...
Justin Pearson
JCT
2008
68views more  JCT 2008»
13 years 7 months ago
Pseudo 2-factor isomorphic regular bipartite graphs
A graph is pseudo 2
Marien Abreu, A. A. Diwan, Bill Jackson, Domenico ...
ITA
2006
163views Communications» more  ITA 2006»
13 years 7 months ago
Graph fibrations, graph isomorphism, and PageRank
PageRank is a ranking method that assigns scores to web pages using the limit distribution of a random walk on the web graph. A fibration of graphs is a morphism that is a local i...
Paolo Boldi, Violetta Lonati, Massimo Santini, Seb...