 ##  [Treewidth](/index.php/treewidth) 

  ##  [Treewidth](https://mathlogic.quantumdictionary.io/treewidth-0) 

  
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- Natural &amp; Formal Sciences -

**Mathematics &amp; Logic Dictionary**

 
Definition

A numerical measure of how close an undirected graph is to a tree, defined as the minimum over all tree decompositions of the maximum bag size minus one; small treewidth means the graph can be organized by small overlapping vertex sets arranged in a tree.