Algebraic Informatics [electronic resource] : 3rd International Conference on Algebraic Informatics, CAI 2009, Thessaloniki, Greece, Mai 19-22, 2009 /

Invited Paper of Werner Kuich -- Cycle-Free Finite Automata in Partial Iterative Semirings -- Tutorials -- Picture Languages: From Wang Tiles to 2D Grammars -- Process Algebra: An Algebraic Theory of Concurrency -- Invited Papers -- On Several Proofs of the Recognizability Theorem -- Theories of Automatic Structures and Their Complexity -- The Graph Programming Language GP -- Canonical Reduction Systems in Symbolic Mathematics -- Contributed Papers -- Solving Norm Form Equations over Number Fields -- A Note on Unambiguity, Finite Ambiguity and Complementation in Recognizable Two-Dimensional Languages -- Context-Free Categorical Grammars -- An Eilenberg Theorem for Pictures -- On the Complexity of the Syntax of Tree Languages -- On the Reversibility of Parallel Insertion, and Its Relation to Comma Codes -- Computation of Pell Numbers of the Form pX 2 -- Iteration Grove Theories with Applications -- Combinatorics of Finite Words and Suffix Automata -- Polynomial Operators on Classes of Regular Languages -- Self-dual Codes over Small Prime Fields from Combinatorial Designs -- A Backward and a Forward Simulation for Weighted Tree Automata -- Syntax-Directed Translations and Quasi-alphabetic Tree Bimorphisms — Revisited -- Polynomial Interpolation of the k-th Root of the Discrete Logarithm -- Single-Path Restarting Tree Automata -- Parallel Communicating Grammar Systems with Regular Control.