A remark on evolutionary systems

Erzsébet Csuhaj-Varjú, Jürgen Dassow

Research output: Contribution to journalArticle


Evolutionary systems have been introduced by Csuhaj-Varjú and Mitrana (Acta Inform. 36 (2000) 913) who proved that two context-sensitive or three context-free components are sufficient to obtain all recursively enumerable languages. We improve these results by showing that two context-free components are sufficient to generate all recursively enumerable languages. Furthermore, we study the power of systems with one component.

Original languageEnglish
Pages (from-to)111-115
Number of pages5
JournalDiscrete Applied Mathematics
Issue number1
Publication statusPublished - Feb 15 2005


  • Descriptional complexity of formal languages
  • Evolutionary systems

ASJC Scopus subject areas

  • Discrete Mathematics and Combinatorics
  • Applied Mathematics

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