Developments in Language Theory [electronic resource] : 11th International Conference, DLT 2007, Turku, Finland, July 3-6, 2007. Proceedings / edited by Tero Harju, Juhani Karhumäki, Arto Lepistö.

Invited Talks -- On First-Order Fragments for Words and Mazurkiewicz Traces -- Quantitative Generalizations of Languages -- What Do We Know About Language Equations? -- Information Distance and Applications -- Finite Automata and the Writing of Numbers -- Descriptional Complexity of Nondeterministic Finite Automata -- Contributed Papers -- From Determinism to Non-determinism in Recognizable Two-Dimensional Languages -- Coding Partitions: Regularity, Maximality and Global Ambiguity -- Multi-letter Reversible and Quantum Finite Automata -- Approximability and Non-approximability Results in Computing the Mean Speedup of Trace Monoids -- The Dynamics of Cellular Automata in Shift-Invariant Topologies -- Two Element Unavoidable Sets of Partial Words -- Hairpin Finite Automata -- Characterizing Reduction Graphs for Gene Assembly in Ciliates -- 2-Visibly Pushdown Automata -- An Efficient Computation of the Equation -Automaton of a Regular -Expression -- An Extension of Newton’s Method to ?-Continuous Semirings -- Non-constructive Methods for Finite Probabilistic Automata -- The Unambiguity of Segmented Morphisms -- Commutation of Binary Factorial Languages -- Inapproximability of Nondeterministic State and Transition Complexity Assuming P???NP -- State Complexity of Union and Intersection of Finite Languages -- Bisimulation Minimisation for Weighted Tree Automata -- Conjunctive Grammars Can Generate Non-regular Unary Languages -- Deterministic Blow-Ups of Minimal Nondeterministic Finite Automata over a Fixed Alphabet -- Reduced Languages as ?-Generators -- Avoiding Approximate Squares -- Duplication Roots -- Complexity Theory for Splicing Systems -- Descriptional Complexity of Bounded Context-Free Languages -- Definable Transductions and Weighted Logics for Texts -- A Star Operation for Star-Free Trace Languages -- Finite Automata on Unranked and Unordered DAGs -- On Almost Periodicity Criteria for Morphic Sequences in Some Particular Cases -- A Local Balance Property of Episturmian Words -- Suffix Automata and Standard Sturmian Words -- Fine Hierarchy of Regular Aperiodic ?-Languages -- On Transition Minimality of Bideterministic Automata.