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» On the Hardness of Graph Isomorphism
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COMBINATORICS
1999
82views more  COMBINATORICS 1999»
13 years 8 months ago
On Highly Closed Cellular Algebras and Highly Closed Isomorphisms
We define and study m-closed cellular algebras (coherent configurations) and m-isomorphisms of cellular algebras which can be regarded as mth approximations of Schurian algebras (...
Sergei Evdokimov, Ilia N. Ponomarenko
AI
2010
Springer
13 years 8 months ago
AllDifferent-based filtering for subgraph isomorphism
The subgraph isomorphism problem involves deciding if there exists a copy of a pattern graph in a target graph. This problem may be solved by a complete tree search combined with ...
Christine Solnon
IPCO
2001
117views Optimization» more  IPCO 2001»
13 years 10 months ago
Pruning by Isomorphism in Branch-and-Cut
The paper presents a branch-and-cut for solving (0, 1) integer linear programs having a large symmetry group. The group is used for pruning the enumeration tree and for generating ...
François Margot
IPL
2010
115views more  IPL 2010»
13 years 7 months ago
Hardness and approximation of minimum distortion embeddings
We show that the problem of computing a minimum distortion embedding of a given graph into a path remains NP-hard when the input graph is restricted to a bipartite, cobipartite, o...
Pinar Heggernes, Daniel Meister
ICDE
2006
IEEE
196views Database» more  ICDE 2006»
14 years 10 months ago
Closure-Tree: An Index Structure for Graph Queries
Graphs have become popular for modeling structured data. As a result, graph queries are becoming common and graph indexing has come to play an essential role in query processing. ...
Huahai He, Ambuj K. Singh