Developments in Language Theory

This book constitutes the proceedings of the 23rd International Conference on Developments in Language Theory, DLT 2019, held in Warsaw, Poland, in August 2019. The 20 full papers presented together with three invited talks were carefullyreviewed and selected from 30 submissions. The papers cover thefollowing topics and areas: combinatorial and algebraic propertiesof words and languages; grammars, acceptors and transducers forstrings, trees, graphics, arrays; algebraic theories for automata andlanguages; codes; efficient text algorithms; symbolic dynamics;decision problems; relationships to complexity theory and logic; picture description and analysis, polyominoes and bidimensionalpatterns; cryptography; concurrency; celluar automata; bio-inspired computing; quantum computing.