Published January 1, 2017 | Version v1
Conference paper Open

On Finite-Index Indexed Grammars and Their Restrictions

  • 1. Univ Calif Santa Barbara, Dept Comp Sci, Santa Barbara, CA 93106 USA
  • 2. Univ Saskatchewan, Dept Comp Sci, Saskatoon, SK S7N 5A9, Canada

Description

The family, L(INDLIN), of languages generated by linear indexed grammars has been studied in the literature. It is known that the Parikh image of every language in L(INDLIN) is semi-linear. However, there are bounded semi-linear languages that are not in L(INDLIN). Here, we look at larger families of (restricted) indexed languages and study their properties, their relationships, and their decidability properties.

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