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STEPHAN KREUTZER COMPLEXITY OF MODEL-CHECKING PROBLEMS 21/81<br />

INTRODUCTION COMPLEXITY UPPER BOUNDS COMPOSITION LOCALITY LOCALISATION GRIDS GRID-LIKE MINORS LABELLED WEBS<br />

Tree-Width<br />

The tree-width of a graph measures its similarity to a tree.<br />

A graph has tree-width ≤ k if it can be covered by sub-graphs of size<br />

≤ (k + 1) in a tree-like fashion.

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