Formal languages
Reducts versus reducing operators
Mathematical aspects of natural and formal languages
Rough Sets: Theoretical Aspects of Reasoning about Data
Rough Sets: Theoretical Aspects of Reasoning about Data
Formal Grammars and Languages
Automata, Languages, and Machines
Automata, Languages, and Machines
Formal languages and their relation to automata
Formal languages and their relation to automata
Fundamenta Informaticae
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In [13] pure generalized grammars were studied, in particular, the problem of reducing a pure generalized grammar to a pure grammar. These results are transferred to the so called pregrammars in the present paper. The obtained results may be applied not only to pure generalized grammars but also to other structures.