A characterization of two-way deterministic classes of languages

Citations of this article
Mendeley users who have this article in their library.


It is shown that a class of languages is defined by a class of two-way deterministic balloon automata if and only if that class is closed under marked union, marked Kleene closure and the inverse mappings performed by deterministic GSMs that move two ways on the input. Hence, the context sensitive languages and various time and tape complexity classes are equivalent to classes of two-way deterministic balloon automata. © 1971 Academic Press, Inc.




Aho, A. V., & Ullman, J. D. (1970). A characterization of two-way deterministic classes of languages. Journal of Computer and System Sciences, 4(6), 523–538. https://doi.org/10.1016/S0022-0000(70)80027-7

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free