[isabelle] New AFP article: Tree Decomposition



Tree Decomposition
Christoph Dittmann

We formalize tree decompositions and tree width in Isabelle/HOL, proving that trees have treewidth 1. We also show that every edge of a tree decomposition is a separation of the underlying graph. As an application of this theorem we prove that complete graphs of size n have treewidth n-1.

http://www.isa-afp.org/entries/Tree_Decomposition.shtml

Enjoy!

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