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FOSSACS
2010
Springer

Toward a Compositional Theory of Leftist Grammars and Transformations

12 years 8 months ago
Toward a Compositional Theory of Leftist Grammars and Transformations
Leftist grammars [Motwani et al., STOC 2000] are special semi-Thue systems where symbols can only insert or erase to their left. We develop a theory of leftist grammars seen as word transformers as a tool toward rigorous analyses of their computational power. Our main contributions in this first paper are (1) constructions proving that leftist transformations are closed under compositions and transitive closures, and (2) a proof that bounded reachability is NP-complete even for leftist grammars with acyclic rules.
Pierre Chambart, Ph. Schnoebelen
Added 18 May 2010
Updated 18 May 2010
Type Conference
Year 2010
Where FOSSACS
Authors Pierre Chambart, Ph. Schnoebelen
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