On Languages Generated by Signed Grammars (2309.08718v1)

Published 15 Sep 2023 in cs.FL

Abstract: We consider languages defined by signed grammars which are similar to context-free grammars except productions with signs associated to them are allowed. As a consequence, the words generated also have signs. We use the structure of the formal series of yields of all derivation trees over such a grammar as a method of specifying a formal language and study properties of the resulting family of languages.

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