609 search results - page 44 / 122 » Computation of Homology Groups and Generators |
136
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LICS
2000
IEEE
15 years 4 months ago
2000
IEEE
We prove that several problems concerning congruences on algebras are complete for nondeterministic log-space. These problems are: determining the congruence on a given algebra gen...
FMSD
2006
14 years 11 months ago
2006
Convex polyhedra are often used to approximate sets of states of programs involving numerical variables. The manipulation of convex polyhedra relies on the so-called double descri...
BMCBI
2007
14 years 11 months ago
2007
Background: The pyridine nucleotide disulfide reductase (PNDR) is a large and heterogeneous protein family divided into two classes (I and II), which reflect the divergent evoluti...
122
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BMCBI
2005
14 years 11 months ago
2005
Background: The alignment of multiple protein sequences is a fundamental step in the analysis of biological data. It has traditionally been applied to analyzing protein families f...
ACL
2010
14 years 9 months ago
2010
We argue that groups of unannotated texts with overlapping and non-contradictory semantics represent a valuable source of information for learning semantic representations. A simp...