Complexity of “wild” matrix problems and of isomorphism of algebras and graphs
✍ Scribed by D. Yu. Grigor'ev
- Publisher
- Springer US
- Year
- 1983
- Tongue
- English
- Weight
- 425 KB
- Volume
- 22
- Category
- Article
- ISSN
- 1573-8795
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## Abstract This paper considers conditions ensuring that cycle‐isomorphic graphs are isomorphic. Graphs of connectivity ⩾ 2 that have no loops were studied in [2] and [4]. Here we characterize all graphs __G__ of connectivity 1 such that every graph that is cycle‐isomorphic to __G__ is also isomor
## Abstract A polynomial time algorithm for testing isomorphism of permutation graphs (comparability graphs of 2‐dimensional partial orders) is described. It operates by performing two types of simplifying transformations on the graph; the contraction of duplicate vertices and the contraction of un