A linear time algorithm for minimum fill-in and treewidth for distance hereditary graphs
A graph is distance hereditary if it preserves distances in all its connected induced subgraphs. The MINIMUM FILL-IN problem is the problem of finding a chordal supergraph with the smallest possible number of edges. The TREEWIDTH problem is the problem of finding a chordal embedding of the graph with the smallest possible clique number. In this paper we show that both problems are solvable in linear time for distance hereditary graphs.
linear time algorithm minimum fill-in treewidth distance hereditary graphs chordal graphs fragment tree tree representation