Automata, Languages and Programming

ICALP { the International Colloquium on Automata, Languages, and Progr- ming { is a series of annual conferences of the European Association for Th- retical Computer Science (EATCS). ICALP’99 was organized by the Institute of Computer Science of the Academy of Sciences of the Czech Republic in - operation with the Action M Agency. Stimulated by the positive experience from previous meetings, the guiding idea of the ICALP’99 organization was to keep and to enhance the idea of a parallel two{track conference with invited plenary talks. Similarly to the two parts of the journal Theoretical Computer Science, Track A of the meeting is devoted to Algorithms, Automata, Complexity, and Games, and Track B to Logic, Semantics, and Theory of Programming. The Program Committee was structured along these same lines. As a further inno- tion, ICALP’99 was coordinated with the European Symposium on Algorithms (ESA’99) in such a way that both conferences took place in the same location with the former immediately followed by the latter. ICALP’99 was the 26th in the series of ICALP colloquia. Previous colloquia were held in Paris (1972), Saarbruc ¨ ken (1974), Edinburgh (1976), Turku (1977), Udine (1978), Graz (1979), Amsterdam (1980), Haifa (1981), Aarhus (1982), Barcelona (1983), Antwerp (1984), Nafplion (1985), Rennes (1986), Karlsruhe (1987), Tampere (1988), Stresa (1989), Warwick (1990), Madrid (1991), Vienna (1992), Lund (1993), Jerusalem (1994), Szeged (1995), Paderborn (1996), Bo- gna (1997), and Aalborg (1998). In the year 2000 ICALP will be held in Geneva.

Invited Talks.- Generating Hard Instances of the Short Basis Problem.- Wide Area Computation.- Proof Techniques for Cryptographic Protocols.- Type Structure for Low-Level Programming Languages.- Real Computations with Fake Numbers.- A Model for Associative Memory, a Basis for Thinking and Consciousness.- Numerical Integration with Exact Real Arithmetic.- Observations about the Nature and State of Computer Science.- DNA Computing: New Ideas and Paradigms.- Online Data Structures in External Memory.- From Computational Learning Theory to Discovery Science.- Contributed Papers.- Bounded Depth Arithmetic Circuits: Counting and Closure.- Parametric Temporal Logic for “Model Measuring”.- Communicating Hierarchical State Machines.- Small Pseudo-Random Sets Yield Hard Functions: New Tight Explicit Lower Bounds for Branching Programs.- General Morphisms of Petri Nets (Extended Abstract).- On Some Tighter Inapproximability Results (Extended Abstract).- Decomposition and Composition of Timed Automata.- New Applications of the Incompressibility Method (Extended Abstract).- Mobility Types for Mobile Ambients.- Protein Folding, the Levinthal Paradox and Rapidly Mixing Markov Chains.- Decidable Fragments of Simultaneous Rigid Reachability.- Text Compression Using Antidictionaries.- Non-interactive Zero-Knowledge: A Low-Randomness Characterization of NP (Extended Abstract).- Timed Alternating Tree Automata: The Automata-Theoretic Solution to the TCTL Model Checking Problem.- Space-Time Tradeoffs for Graph Properties.- Boundedness of Reset P/T Nets.- Two-way finite state transducers and monadic second-order logic.- Partially Ordered Regular Languages for Graph Queries.- Deciding First-Order Properties of Locally Tree-Decomposable Graphs.- Comparison of Process Algebra Equivalences Using Formats.- Compact Routing Tables for Graphs of Bounded Genus (Extended Abstract).- Computing LOGCFL Certificates.- Efficient Techniques for Maintaining Multidimensional Keys in Linked Data Structures (Extended Abstract).- On the Complements of Partial k-Trees.- Approximation Results for Kinetic Variants of TSP.- Distributed Probabilistic Polling and Applications to Proportionate Agreement.- Bisimulation Equivalence Is Decidable for Normed Process Algebra (Extended abstract).- A Framework for Decidable Metrical Logics.- On the Power of Las Vegas II. Two-Way Finite Automata.- Stable Marriage with Incomplete Lists and Ties.- Average-Case Complexity of Shellsort (Preliminary Version).- Linear-Time Construction of Two-Dimensional Suffix Trees (Extended Abstract).- A Connection between the Star Problem and the Finite Power Property in Trace Monoids (Extended Abstract).- Two Techniques in the Area of the Star Problem.- Approximations by OBDDs and the Variable Ordering Problem.- Simulation Preorder on Simple Process Algebras.- Solos in Concert.- Shortest Anisotropic Paths on Terrains.- Relations between Local and Global Periodicity of Words (Extended Abstract).- Efficient Merging, Construction, and Maintenance of Evolutionary Trees.- Formalizing a Lazy Substitution Proof System for ?-Calculus in the Calculus of Inductive Constructions.- Leader Election by d Dimensional Cellular Automata.- New Upper Bounds for MaxSat.- Polynomial and Rational Evaluation and Interpolation (with Structured Matrices) ?.- Low Redundancy in Static Dictionaries with O(1) Worst Case Lookup Time.- Finite Automata with Generalized Acceptance Criteria.- A Variant of the Arrow Distributed Directory with Low Average Complexity (Extended Abstract).- Closed Freyd- and ?-categories.- Typed Exceptions and Continuations Cannot Macro-Express Each Other.- Automata, Power Series, and Coinduction: Taking Input Derivatives Seriously (Extended Abstract).- Accessing Multiple Sequences Through Set Associative Caches.- T(A) = T(B)?.- Many-Valued Logics and Holographic Proofs.- On the Complexity and Inapproximability of Shortest Implicant Problems.- The Wave Propagator Is Turing Computable.- An FPTAS for Agreeably Weighted Variance on a Single Machine (Extended Abstract).- Erratum: Bulk-Synchronous Parallel Multiplication of Boolean Matrices.