We study the L ambiguity of morphisms of the free monoid. We define four basic ambiguity sets and establish their effective regularity in many cases. Decidability results concerning L codes are… Expand

We present characterization and decidability results concerning bounded delay of L codes. It is also shown that, for L morphisms (morphisms applied in the “L way”), the sets causing ambiguities are… Expand

It turns out that going through all propagating morphismsf and g, the family of maximal solutions obtained equals the famdy of complements of recursively enumerable languages after intersecting with regular languages and mapping with propagating Morphisms.Expand

A survey of the different areas of the theory of developmental systems and languages in such a way that it discusses typical results obtained in each particular problem area.Expand

Developmental systems were introduced in order to model morphogenetic (pattern-generating) processes in growing, multicellular, filamentous organisms by considering the states and outputs to be identical and thus omitting the output functions.Expand