[PDF][PDF] Some properties of the class of L languages with interactions

G Rozenberg, KP Lee - Journal of Computer and System Sciences, 1975 - core.ac.uk
… In particular, the subject of investigation of this paper, the class of L systems and languages
with interactions (or 1L systems and languages for short), are defined there. … In this section
we shall investigate closure properties of the family ~([L) with respect to some familiar
operations in formal language theory (see, eg, [2]). Before doing so, we shall prove that some
languages are not members of the family ~q~(IL). They will be useful in investigating closure …

[CITATION][C] Some properties of the class of L-languages with interactions, submitted for publication

G ROZENBERG, KP LEE - 1973 - available as technical report
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