Undecidable Properties on Length-Two String Rewriting Systems
β Scribed by Masahiko Sakai; Yi Wang
- Book ID
- 108126929
- Publisher
- Elsevier Science
- Year
- 2008
- Tongue
- English
- Weight
- 353 KB
- Volume
- 204
- Category
- Article
- ISSN
- 1571-0661
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π SIMILAR VOLUMES
This paper investigates decision problems of finite, special string-rewriting systems . There are two main results . The first one is that the word problem for a finite, special string-rewriting system T on alphabet A is reducible to its restricted version: given a word w, is w congruent to any fixe
It is shown that it is undecidable in general whether or not a monoid that is presented by a finite special string-rewriting system is a group. The given proof uses the technique of canonical string-rewriting systems.
The termination of a confluent one-rule string-rewriting system R = (s + I} is reduced to that of another one-rule system K = {s' -B t') such that s' is self-overlap-free &of). A necessary and sufficient condition is given for termination of a one-rule system R = {s --+ t} such that s is sof and s o