Schaefer's theorem is a complexity classification result for so-called Boolean constraint satisfaction problems: it states that every Boolean constraint satisfaction problem is either contained in one out of six classes and can be solved in poly- nomial time, or is NP-complete.
Nov 12, 2010 · Schaefer's theorem is a complexity classification result for so-called Boolean constraint satisfaction problems.
Schaefer's theorem is a complexity classification result for so-called Boolean constraint satisfaction problems: it states that every Boolean constraint ...
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Schaefer's theorem is a complexity classification result for so-called Boolean constraint satisfaction problems: it states that every Boolean constraint ...
Nov 8, 2010 · Schaefer's theorem is a complexity classification result for so-called Boolean con- straint satisfaction problems: it states that every Boolean ...
It is proved that either Psi is contained in one out of 17 classes of graph formulas and the corresponding problem can be solved in polynomial time, ...
Schaefer's theorem is a complexity classification result for so-called Boolean constraint satisfaction problems: it states that every Boolean constraint ...
Schaefer's dichotomy theorem, proved by Thomas Jerome Schaefer, states necessary and sufficient conditions under which a finite set S of relations over the ...
Schaefer's theorem states that Boolean-SAT(Ψ) can be solved in polyno- mial time if Ψ is a subset of one of six sets of Boolean formulas (called 0- ...
For a graph formula ψ(x1,...,xn), define a relation. Rψ := {(a1,...,an) ∈ Vn : ψ(a1,...,an)}. For a set Ψ of graph formulas, define a structure.