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<p>true of the vertices and adjacency relation of . The algorithmic problem of <a href="page.php?w=model_checking">model checking</a> concerns testing whether a given graph models a given sentence. The algorithmic problem of <a href="page.php?w=satisfiability">satisfiability</a> concerns testing whether there exists a graph that models a given sentence.Although both model checking and satisfiability are hard in general, several major algorithmic meta-theorems show that properties expressed in this way can be tested efficiently for important classes</p><p>
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