Syntactic Analysis and Operator Precedence
Journal of the ACM (JACM)
Journal of the ACM (JACM)
Characterizations of Pushdown Machines in Terms of Time-Bounded Computers
Journal of the ACM (JACM)
A Note on Tape-Bounded Complexity Classes and Linear Context-Free languages
Journal of the ACM (JACM)
EULER: a generalization of ALGOL and it formal definition: Part 1
Communications of the ACM
The Theory of Parsing, Translation, and Compiling
The Theory of Parsing, Translation, and Compiling
Storage requirements for deterministic / polynomial time recognizable languages
STOC '74 Proceedings of the sixth annual ACM symposium on Theory of computing
Complete problems for deterministic polynomial time
STOC '74 Proceedings of the sixth annual ACM symposium on Theory of computing
Word problems requiring exponential time(Preliminary Report)
STOC '73 Proceedings of the fifth annual ACM symposium on Theory of computing
Some properties of precedence languages
STOC '69 Proceedings of the first annual ACM symposium on Theory of computing
NONDETERMINISTIC TIME AND SPACE COMPLEXITY CLASSES
NONDETERMINISTIC TIME AND SPACE COMPLEXITY CLASSES
Formal languages and their relation to automata
Formal languages and their relation to automata
Log Space Recognition and Translation of Parenthesis Languages
Journal of the ACM (JACM)
A Linear-Time On-Line Recognition Algorithm for ``Palstar''
Journal of the ACM (JACM)
On the Tape Complexity of Deterministic Context-Free Languages
Journal of the ACM (JACM)
Separating tape bounded auxiliary pushdown automata classes
STOC '77 Proceedings of the ninth annual ACM symposium on Theory of computing
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A deterministic context-free language L0 is described which is log(n)-complete for the family of languages recognized by deterministic log(n)- tape bounded auxiliary pushdown automata in polynomial time. It follows that L0 is a “hardest” deterministic context-free language (DCFL), since all DCFL's are recognized in polynomial time by deterministic pushdown automata. L0 is, moreover, a simple precedence language and a simple LL(1) language. Thus the tape complexities of these proper subfamilies are essentially the same as the tape complexity of all DCFL's. We show that an auxiliary pushdown store does, in fact, add some power to some restricted families of log(n)-tape bounded Turing machines. The basic result is that every two-way 2k-head nondeterministic finite automation can be replaced by an equivalent two-way k-head nondeterministic pushdown automation. This indicates, also, that every 2k-head nondeterministic finite automation language can be recognized in 0(n3k) steps. Other results relate multihead automata classes with other multihead automata classes, with families recognized by log(n)-tape bounded Turing machines with restricted tape alphabets, and with time-bounded complexity classes.