Multisequential Grammars with Homogeneous Selectors

Abstract

This paper deals with selective substitution grammars. It concentrates on multisequential grammars with homogeneous selectors that have all their activated parts identical. The present paper reduces the number and size of selectors in these grammars. Indeed, it demonstrates that for every phrase-structure grammar, there exists an equivalent multisequential grammar having two homogeneous selectors, either of which has only two activated parts.