Invited papers.- The New Complexity Landscape around Circuit Minimization.- Containment and Equivalence of Weighted Automata: Probabilistic and Max-Plus Cases.- Approaching Arithmetic Theories with Finite-State Automata.- Recompression: technique for word equations and compressed data.- How to prove that a language is regular or star-free.- Deciding classes of regular languages: the covering approach.- Algebraic Structures.- Nonstandard Cayley Automatic Representations for Fundamental Groups of Torus Bundles Over the Circle.- Deciding (R,+, < ,1) in (R,+, < ,Z).- Ordered Semiautomatic Rings with Applications to Geometry.- Automata.- Boolean monadic recursive schemes as a logical characterization of the subsequential functions.- Expressiveness and Conciseness of Timed Automata for the Verification of Stochastic Models.- Windable Heads & Recognizing NL with Constant Randomness.- Alternating Finite Automata with Limited Universal Branching.- Pebble-Intervals Automata and FO2 with Two Orders.- Limited Two-Way Deterministic Finite Automata with Advice.- Complexity.- On the size of depth-two threshold circuits for the inner product mod 2 function.- Complexity Issues of String to Graph Approximate Matching.- Complexity of Automatic Sequences.- Grammars.- Context-sensitive Fusion Grammars are Universal.- Cyclic shift on multi-component grammars.- Languages.- The Automatic Baire Property and an Effective Property of omega-Rational Functions.- The Power of Programs over Monoids in J.- Geometrically Closed Positive Varieties of Star-Free Languages.- Intersection and Union Hierarchies of Deterministic Context-Free Languages and Pumping Lemmas.- Trees and Graphs.- On the Weisfeiler-Leman Dimension of Fractional Packing.- Input Strictly Local Tree Transducers.- Words and Codes.- Lyndon words versus inverse Lyndon words: queries on su xes and bordered words.- On collapsing pre x normal words.- Simplified Parsing Expression Derivatives.- Complete Variable-Length Codes: An Excursion into Word Edit Operations.