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Families of automata characterizing context-sensitive languages

✍ Scribed by Christophe Morvan; Chloé Rispal


Publisher
Springer-Verlag
Year
2005
Tongue
English
Weight
238 KB
Volume
41
Category
Article
ISSN
0001-5903

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A generator of context-sensitive languag
✍ Ben Wegbreit 📂 Article 📅 1969 🏛 Elsevier Science 🌐 English ⚖ 252 KB

The existence of a context-sensitive grammar, G~, which acts as a "generator" of all context-sensitive languages is established. Specifically, G~ has the property that for each context-sensitive language, L, there exists a regular set, RL, and an e-limited gsm, gL, such that L = gz(L(G,,) ~ .RL). It

Growth-sensitivity of context-free langu
✍ Tullio Ceccherini-Silberstein; Wolfgang Woess 📂 Article 📅 2003 🏛 Elsevier Science 🌐 English ⚖ 265 KB

A language L over a ÿnite alphabet is called growth-sensitive if forbidding any set of subwords F yields a sub-language L F whose exponential growth rate is smaller than that of L. It is shown that every (essentially) ergodic non-linear context-free language of convergent type is growth-sensitive. "