Formal languages
Information and Computation
Journal of the ACM (JACM)
Multi-tape and infinite-state automata—a survey
Communications of the ACM
Regulated Rewriting in Formal Language Theory
Regulated Rewriting in Formal Language Theory
Formal languages and their relation to automata
Formal languages and their relation to automata
Self-regulating finite automata
Acta Cybernetica
Hi-index | 0.00 |
This paper introduces and discusses pure multi-pushdown automata that remove symbols from their pushdowns only by performing complete pushdown pops. This. means that during a pop operation, the entire pushdown is compared with a prefix of the input, and if they match, the whole contents of the pushdown is erased and the input is advanced by the prefix. The paper proves that these automata define an infinite hierarchy of language families identical with the infinite hierarchy of language families resulting from right linear simple matrix grammars. In addition, this paper discusses some other extensions of these automata with respect to operations they can perform with their pushdowns. More specifically, it discusses pure multi-pushdown automata that perform complete pushdown pops that are allowed to join two pushdowns and/or create a new pushdown.