A note on realtime one-way synchronized alternating one-counter automata
Theoretical Computer Science
Deterministic versus nondeterministic space in terms of synchronized alternating machines
Theoretical Computer Science
Journal of the ACM (JACM)
Introduction To Automata Theory, Languages, And Computation
Introduction To Automata Theory, Languages, And Computation
On the Power of Communication in Alternating Machines
MFCS '88 Proceedings of the Mathematical Foundations of Computer Science 1988
On the Power of Synchronization in Parallel Computations
MFCS '89 Proceedings on Mathematical Foundations of Computer Science 1989
An Improved Algorithm for the Membership Problem for Extended Regular Expressions
MFCS '02 Proceedings of the 27th International Symposium on Mathematical Foundations of Computer Science
Hi-index | 0.00 |
In this paper, we introduce a new model of automata, called input-synchronized alternating finite automata (i-SAFAs), and study the power of i-SAFAs. We here consider two types of i-SAFAs, one-way i-SAFAs and two-way i-SAFAs. Then we show that (1) the class of languages accepted by one-way i-SAFAs is equal to the class of regular languages, (2) two-way i-SAFAs are more powerful than one-way i-SAFAs, that is, there exists a language L such that L is accepted by a two-way i-SAFA but not accepted by any one-way i-SAFAs. In addition, we show that the class of languages accepted by f(n) parallel-bounded two-way i-SAFAs is included in Nspace(S(n)), where S(n) = min{n log n, f(n) log n}.