The 84 revised full papers presented together with six invited papers were carefully reviewed and selected from 212 submissions. The papers are organized in topical sections including algorithms, process algebra, approximation algorithms, languages and programming, complexity and data structures.

Invited Lectures.- Polarized Process Algebra and Program Equivalence.- Problems on RNA Secondary Structure Prediction and Design.- Some Issues Regarding Search, Censorship, and Anonymity in Peer to Peer Networks.- The SPQR-Tree Data Structure in Graph Drawing.- Model Checking and Testing Combined.- Logic and Automata: A Match Made in Heaven.- Algorithms.- Pushdown Automata and Multicounter Machines, a Comparison of Computation Modes.- Generalized Framework for Selectors with Applications in Optimal Group Testing.- Decoding of Interleaved Reed Solomon Codes over Noisy Data.- Process Algebra.- On the Axiomatizability of Ready Traces, Ready Simulation, and Failure Traces.- Resource Access and Mobility Control with Dynamic Privileges Acquisition.- Replication vs. Recursive Definitions in Channel Based Calculi.- Approximation Algorithms.- Improved Combinatorial Approximation Algorithms for the k-Level Facility Location Problem.- An Improved Approximation Algorithm for the Asymmetric TSP with Strengthened Triangle Inequality.- An Improved Approximation Algorithm for Vertex Cover with Hard Capacities.- Approximation Schemes for Degree-Restricted MST and Red-Blue Separation Problem.- Approximating Steiner k-Cuts.- MAX k-CUT and Approximating the Chromatic Number of Random Graphs.- Approximation Algorithm for Directed Telephone Multicast Problem.- Languages and Programming.- Mixin Modules and Computational Effects.- Decision Problems for Language Equations with Boolean Operations.- Generalized Rewrite Theories.- Complexity.- Sophistication Revisited.- Scaled Dimension and Nonuniform Complexity.- Quantum Search on Bounded-Error Inputs.- A Direct Sum Theorem in Communication Complexity via Message Compression.- Data Structures.- Optimal Cache-Oblivious Implicit Dictionaries.- TheCell Probe Complexity of Succinct Data Structures.- Succinct Representations of Permutations.- Succinct Dynamic Dictionaries and Trees.- Graph Algorithms.- Labeling Schemes for Weighted Dynamic Trees.- A Simple Linear Time Algorithm for Computing a (2k — 1)-Spanner of O(n 1+1/k ) Size in Weighted Graphs.- Multicommodity Flows over Time: Efficient Algorithms and Complexity.- Multicommodity Demand Flow in a Tree.- Automata.- Skew and Infinitary Formal Power Series.- Nondeterminism versus Determinism for Two-Way Finite Automata: Generalizations of Sipser’s Separation.- Residual Languages and Probabilistic Automata.- A Testing Scenario for Probabilistic Automata.- The Equivalence Problem for t-Turn DPDA Is Co-NP.- Flip-Pushdown Automata: k + 1 Pushdown Reversals Are Better than k.- Optimization and Games.- Convergence Time to Nash Equilibria.- Nashification and the Coordination Ratio for a Selfish Routing Game.- Stable Marriages with Multiple Partners: Efficient Search for an Optimal Solution.- An Intersection Inequality for Discrete Distributions and Related Generation Problems.- Graphs and Bisimulation.- Higher Order Pushdown Automata, the Caucal Hierarchy of Graphs and Parity Games.- Undecidability of Weak Bisimulation Equivalence for 1-Counter Processes.- Bisimulation Proof Methods for Mobile Ambients.- On Equivalent Representations of Infinite Structures.- Online Problems.- Adaptive Raising Strategies Optimizing Relative Efficiency.- A Competitive Algorithm for the General 2-Server Problem.- On the Competitive Ratio for Online Facility Location.- A Study of Integrated Document and Connection Caching.- Verification.- A Solvable Class of Quadratic Diophantine Equations with Applications to Verification of Infinite-State Systems.- Monadic Second-Order Logics withCardinalities.- ? 2 ? ? 2 ? AFMC.- Upper Bounds for a Theory of Queues.- Around the Internet.- Degree Distribution of the FKP Network Model.- Similarity Matrices for Pairs of Graphs.- Algorithmic Aspects of Bandwidth Trading.- Temporal Logic and Model Checking.- CTL+ Is Complete for Double Exponential Time.- Hierarchical and Recursive State Machines with Context-Dependent Properties.- Oracle Circuits for Branching-Time Model Checking.- Graph Problems.- There Are Spanning Spiders in Dense Graphs (and We Know How to Find Them).- The Computational Complexity of the Role Assignment Problem.- Fixed-Parameter Algorithms for the (k, r)-Center in Planar Graphs and Map Graphs.- Genus Characterizes the Complexity of Graph Problems: Some Tight Results.- Logic and Lambda-Calculus.- The Definition of a Temporal Clock Operator.- Minimal Classical Logic and Control Operators.- Counterexample-Guided Control.- Axiomatic Criteria for Quotients and Subobjects for Higher-Order Data Types.- Data Structures and Algorithms.- Efficient Pebbling for List Traversal Synopses.- Function Matching: Algorithms, Applications, and a Lower Bound.- Simple Linear Work Suffix Array Construction.- Types and Categories.- Expansion Postponement via Cut Elimination in Sequent Calculi for Pure Type Systems.- Secrecy in Untrusted Networks.- Locally Commutative Categories.- Probabilistic Systems.- Semi-pullbacks and Bisimulations in Categories of Stochastic Relations.- Quantitative Analysis of Probabilistic Lossy Channel Systems.- Discounting the Future in Systems Theory.- Information Flow in Concurrent Games.- Sampling and Randomness.- Impact of Local Topological Information on Random Walks on Finite Graphs.- Analysis of a Simple Evolutionary Algorithm for Minimization in Euclidean Spaces.- OptimalCoding and Sampling of Triangulations.- Generating Labeled Planar Graphs Uniformly at Random.- Scheduling.- Online Load Balancing Made Simple: Greedy Strikes Back.- Real-Time Scheduling with a Budget.- Improved Approximation Algorithms for Minimum-Space Advertisement Scheduling.- Anycasting in Adversarial Systems: Routing and Admission Control.- Geometric Problems.- Dynamic Algorithms for Approximating Interdistances.- Solving the Robots Gathering Problem.