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2nd International Conference on Symmetry and Antisymmetry in Mathematics, Formal Languages and Computer Science
June 29 - July 1, 2000
"Transylvania" University of Brasov
Brasov, Romania

Organizers
Gabriel V. Orman, Radu Paltanea, Dorin Bocu, N. Pascu, E. Popescu, O. Popescu, I. Radomir, L. Sangeorzan, M. Neagu, E. Paltanea, D. Raducanu

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On some Symmetry-Characterizations of Generative Systems
by
Gabriel V. Orman
"Transilvania" University of Brasov, Dept. of Mathematical Analysis and Probability

For some time past our interest was focused to find new possibilities for characterizing the process of generation of the words by generative systems. In some previous papers we have introduced some numerical functions able to characterize classes of derivations according to a given generative system up to an equivalence. They are referred to as "derivational functions". In this paper we consider equivalence classes of derivations and we establish some new properties of symmetry and invariance.

Date received: March 3, 2000

Copyright © 2000 by the author(s). The author(s) of this document and the organizers of the conference have granted their consent to include this abstract in Atlas Conferences Inc. Document # caet-11.