Space-time isomorphism problem is intractable (NP-hard)
โ Scribed by Vladik Kreinovich
- Publisher
- Springer
- Year
- 1991
- Tongue
- English
- Weight
- 451 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0020-7748
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๐ SIMILAR VOLUMES
A finite set of term equations \(E\) is called subject to the occur-check (STO) if a sequence of actions of the Martelli-Montanari unification algorithm starts with \(E\) and ends with a failure due to occur-check. We prove here that the problem of deciding whether \(E\) is STO is NP-hard.
A distributed hard real time system can be composed from a number of communicating tasks. One of the difficulties with building such systems is the problem of where to place the tasks. In general there are pr ways of allocating Ttasks to P processors, and the problem of finding an optimal feasible a