On simulating non-returning PC grammar systems with returning systems
نویسندگان
چکیده
منابع مشابه
On the Size Complexity of Non-Returning Context-Free PC Grammar Systems
Improving the previously known best bound, we show that any recursively enumerable language can be generated with a non-returning parallel communicating (PC) grammar system having six contextfree components. We also present a non-returning universal PC grammar system generating unary languages, that is, a system where not only the number of components, but also the number of productions and the...
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When modeling natural languages, three languages are of special interest. In natural languages, there occur phenomena like multiple agreements, crossed agreements and replication. These aspects are represented by the three languages K1 = {abc |n ≥ 1}, K2 = {abcd |m,n ≥ 1} and K3 = {ww |w ∈ {a, b}}, respectively. In the present paper, we give parallel communicating grammar systems (PC grammar sy...
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ژورنال
عنوان ژورنال: Theoretical Computer Science
سال: 1998
ISSN: 0304-3975
DOI: 10.1016/s0304-3975(97)00120-5