Developments in Language Theory

Invited Talks.- Morphic sequences versus automatic sequences.- Parsimonious Computational Completeness Pointlike sets and separation: a personal perspective.- Regular Papers.- A strong non-overlapping Dyck code.- Active Learning of Sequential Transducers with Side Information about the Domain.- Compositions of Constant Weighted Extended Tree Transducers.- Extremal Binary PFAs in a Cerny Family.- Variations on the Post Correspondence Problem for Free Groups.- Reducing local alphabet size in recognizable picture languages.- Properties of Graphs Specified by a Regular Language.- Balanced-by-construction regular and omega-regular languages.- Weighted Prefix Normal Words: Mind the Gap.- Two-Way Non-Uniform Finite Automata.- Integer Weighted Automata on Infinite Words.- Deciding FO2 Alternation for Automata over Finite and Infinite Words.- State Complexity of Projection on Languages Recognized by Permutation Automata and Commuting Letters.- Constrained Synchronization and Subset Synchronization Problems for Weakly Acyclic Automata.- Lyndon words formalized in Isabelle/HOL.- The Range of State Complexities of Languages Resulting from the Cascade Product-The General Case (Extended Abstract).- Second-order finite automata: expressive power and simple proofs using automatic structures.- Reversible Top-Down Syntax Analysis.- Symmetry groups of infinite words.- Bounded Languages Described by GF(2)-grammas.- Definability Results for Top-Down Tree Transducers.- The hardest LL(k) language.- Upper Bounds on Distinct Maximal (Sub-)Repetitions in Compressed Strings.- Branching Frequency and Markov Entropy of Repetition-Free Languages.- A Linear-time Simulation of Deterministic d-Limited Automata.- Caratheodory Extensions of Subclasses of Regular Languages.- Parikh Word Representable Graphs and Morphisms.