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STEPHAN KREUTZER COMPLEXITY OF MODEL-CHECKING PROBLEMS 13/81 INTRODUCTION COMPLEXITY UPPER BOUNDS COMPOSITION LOCALITY LOCALISATION GRIDS GRID-LIKE MINORS LABELLED WEBS Structural Characterisation of Model-Checking Problems In the terminology of parametrized complexity: MSO-model-checking is fpt on the class of finite trees. Question. What are the largest/most general classes of graphs on which MSO becomes tractable? And the same question applies to first-order logic. Research programme. For each of the natural logics L such as FO or MSO, identify a structural property P of classes C of graphs such that MC(L,C) is tractable if, and only if, C has the property P We may not always get an exact characterisation, there may be gaps. But such a characterisation would give an easy tool to assess whether MSO-model-checking is tractable on some class.
STEPHAN KREUTZER COMPLEXITY OF MODEL-CHECKING PROBLEMS 13/81 INTRODUCTION COMPLEXITY UPPER BOUNDS COMPOSITION LOCALITY LOCALISATION GRIDS GRID-LIKE MINORS LABELLED WEBS Structural Characterisation of Model-Checking Problems In the terminology of parametrized complexity: MSO-model-checking is fpt on the class of finite trees. Question. What are the largest/most general classes of graphs on which MSO becomes tractable? And the same question applies to first-order logic. Research programme. For each of the natural logics L such as FO or MSO, identify a structural property P of classes C of graphs such that MC(L,C) is tractable if, and only if, C has the property P We may not always get an exact characterisation, there may be gaps. But such a characterisation would give an easy tool to assess whether MSO-model-checking is tractable on some class.
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STEPHAN KREUTZER COMPLEXITY OF MODE
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INTRODUCTION COMPLEXITY UPPER BOUND
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