Theory of L systems: From the point of view of formal language theory
We would like to conclude this paper with two remarks.
(1) In the first five years of its existence the mathematical theory of L systems has become each year fruitful and popular. This is exemplified by exponential growth of the number of papers produced (per year), and a linear (with a decent coefficient) growth of both the number of results and the number of people joining the area.
(2) It may have already occurred to the reader (and it is certainly clear to the author of this paper) that both formal language theory and the theory of L systems have benefited by the existence of the other.