Toward Characterization of Perfect Elimination Digraphs
β Scribed by Haskins, Loren; Rose, Donald J.
- Book ID
- 118153803
- Publisher
- Society for Industrial and Applied Mathematics
- Year
- 1973
- Tongue
- English
- Weight
- 771 KB
- Volume
- 2
- Category
- Article
- ISSN
- 0097-5397
- DOI
- 10.1137/0202018
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π SIMILAR VOLUMES
We develop a constant time transposition "oracle" for the set of perfect elimination orderings of chordal graphs. Using this oracle, we can generate a Gray code of all perfect elimination orderings in constant amortized time using known results about antimatroids. Using clique trees, we show how the
A ΓΏnite-state machine is called a Thompson machine if it can be constructed from an emptyfree regular expression using the construction of Thompson as modiΓΏed by Hopcroft and Ullman. We call the underlying digraph of a Thompson machine a Thompson digraph. We characterize Thompson digraphs and we giv