Complexity and real computation
Complexity and real computation
Descriptive Complexity and Model Checking
Proceedings of the 18th Conference on Foundations of Software Technology and Theoretical Computer Science
Nondeterminism and the size of two way finite automata
STOC '78 Proceedings of the tenth annual ACM symposium on Theory of computing
The complexity of translating logic to finite automata
Automata logics, and infinite games
Size Complexity of Two-Way Finite Automata
DLT '09 Proceedings of the 13th International Conference on Developments in Language Theory
Size complexity of rotating and sweeping automata
Journal of Computer and System Sciences
DCFS'12 Proceedings of the 14th international conference on Descriptional Complexity of Formal Systems
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Let 1N and SN be the classes of families of problems solvable by families of polynomial-size one-way and sweeping nondeterministic finite automata, respectively. We characterize 1N in terms of families of polynomial-length formulas of monadic second-order logic with successor. These formulas existentially quantify two local conditions in disjunctive normal form: one on cells polynomially away from the two ends of the input, and one more on the cells of a fixed-width window sliding along it. We then repeat the same for SN and for slightly more complex formulas.