88 search results - page 7 / 18 » On the Complexity of Matroid Isomorphism Problem |
ACL
2011
13 years 5 days ago
2011
We cast the word alignment problem as maximizing a submodular function under matroid constraints. Our framework is able to express complex interactions between alignment component...
STACS
1992
Springer
14 years 18 days ago
1992
Springer
We show that the graph isomorphism problem is low for PP and for C=P, i.e., it does not provide a PP or C=P computation with any additional power when used as an oracle. Furthermor...
JCP
2006
13 years 8 months ago
2006
Finding a maximum cardinality matching in a graph is a problem appearing in numerous settings. The problem asks for a set of edges of maximum cardinality, such that no two edges of...
DAM
2006
13 years 8 months ago
2006
The maximum intersection problem for a matroid and a greedoid, given by polynomialtime oracles, is shown NP-hard by expressing the satisfiability of boolean formulas in 3-conjunct...
COCOON
2003
Springer
14 years 1 months ago
2003
Springer
Abstract. We show that finding roots of Boolean matrices is an NPhard problem. This answers a twenty year old question from semigroup theory. Interpreting Boolean matrices as dire...