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Dokumenttyp:
Technical Report 
Autor(en):
Henning Bordihn; Juergen Dassow; Markus Holzer 
Titel:
Extending Regular Expressions with Homomorphic Replacement 
Abstract:
We define H-expressions and EH-expressions as extensions of regular expressions by adding homomorphic and iterated homomorphic replacement as new operations, resp. The definition is analogous to the extension given by Gruska in order to characterize context-free languages. We compare the families of languages obtained by these extensions with the families of regular, linear context-free, context-free, and ETT0L languages. Furthermore, we present their closure properties with respect to TRIO oper...    »
 
Stichworte:
Regular Expressions; Homomorphic Replacement; Formal Languages; Decision Problems 
Jahr:
2001 
Jahr / Monat:
2001-08-01 00:00:00 
Seiten/Umfang:
28