STACS 2003

The Symposium on Theoretical Aspects of Computer Science (STACS) is - ternately held in France and Germany. The latest conference, February 27 to March 1, 2003 at the Institute of Computer Science, Freie Universit at Berlin is the twentieth in this series. The previous meetings took place in Paris (1984), Saarbruc ken (1985), Orsay (1986), Passau (1987), Bordeaux (1988), Paderborn (1989), Rouen (1990), Hamburg (1991), Cachan (1992), Wurzburg (1993), Caen (1994), Munc hen (1995), Grenoble (1996), Lub eck (1997), Paris (1998), Trier (1999), Lille (2000), Dresden (2001), and Antibes/Juan-les-Pins (2002). Unlike some other important theory conferences STACS covers the whole range of theoretical computer science including algorithms and data structures, automata and formal languages, complexity theory, semantics, logic in computer science, and current challenges like biological computing, quantum computing, and mobile and net computing. The interest in STACS has been increasing continuously during recent years and has turned it into one of the most signi?cant conferences in theoretical computer science. The STACS 2003 call for papers led to a record number of 253 submissions from all over the world.

Includes supplementary material: sn.pub/extras

Inhalt
Invited Papers.- Logic as a Query Language: From Frege to XML.- How Does Computer Science Change Molecular Biology?.- Contributed Papers.- Improved Compact Visibility Representation of Planar Graph via Schnyder's Realizer.- Rectangle Visibility Graphs: Characterization, Construction, and Compaction.- Approximating Geometric Bottleneck Shortest Paths.- Optimization in Arrangements.- Complete Classifications for the Communication Complexity of Regular Languages.- The Commutation with Codes and Ternary Sets of Words.- On the Confluence of Linear Shallow Term Rewrite Systems.- Wadge Degrees of ?-Languages of Deterministic Turing Machines.- Faster Deterministic Broadcasting in Ad Hoc Radio Networks.- Private Computations in Networks: Topology versus Randomness.- On Shortest-Path All-Optical Networks without Wavelength Conversion Requirements.- Lattice Reduction by Random Sampling and Birthday Methods.- On the Ultimate Complexity of Factorials.- On the Effective Jordan Decomposability.- Fast Algorithms for Extended Regular Expression Matching and Searching.- Algorithms for Transposition Invariant String Matching (Extended Abstract).- On the Complexity of Finding a Local Maximum of Functions on Discrete Planar Subsets.- Some Results on Derandomization.- On the Representation of Boolean Predicates of the Diffie-Hellman Function.- Quantum Circuits with Unbounded Fan-out.- Analysis of the Harmonic Algorithm for Three Servers.- Non-clairvoyant Scheduling for Minimizing Mean Slowdown.- Space Efficient Hash Tables with Worst Case Constant Access Time.- Randomized Jumplists: A Jump-and-Walk Dictionary Data Structure.- Complexity Theoretical Results on Nondeterministic Graph-Driven Read-Once Branching Programs.- Randomness versus Nondeterminism for Read-Once and Read-k BranchingPrograms.- Branch-Width, Parse Trees, and Monadic Second-Order Logic for Matroids.- Algebraic Characterizations of Small Classes of Boolean Functions.- On the Difficulty of Some Shortest Path Problems.- Representing Graph Metrics with Fewest Edges.- Computing Shortest Paths with Uncertainty.- Solving Order Constraints in Logarithmic Space.- The Inversion Problem for Computable Linear Operators.- Algebras of Minimal Rank over Arbitrary Fields.- Evolutionary Algorithms and the Maximum Matching Problem.- Alternative Algorithms for Counting All Matchings in Graphs.- Strong Stability in the Hospitals/Residents Problem.- The Inference Problem for Propositional Circumscription of Afine Formulas Is coNP-Complete.- Decidable Theories of Cayley-Graphs.- The Complexity of Resolution with Generalized Symmetry Rules.- Colouring Random Graphs in Expected Polynomial Time.- An Information-Theoretic Upper Bound of Planar Graphs Using Triangulation.- Finding Large Independent Sets in Polynomial Expected Time.- Distributed Soft Path Coloring.- Competing Provers Yield Improved Karp-Lipton Collapse Results.- One Bit of Advice.- Strong Reductions and Immunity for Exponential Time.- The Complexity of Membership Problems for Circuits over Sets of Natural Numbers.- Performance Ratios for the Differencing Method Applied to the Balanced Number Partitioning Problem.- Cake-Cutting Is Not a Piece of Cake.- The Price of Truth: Frugality in Truthful Mechanisms.- Untameable Timed Automata!.- The Intrinsic Universality Problem of One-Dimensional Cellular Automata.- On Sand Automata.- Adaptive Sorting and the Information Theoretic Lower Bound.- A Discrete Subexponential Algorithm for Parity Games.- Cryptographically Sound and Machine-Assisted Verification of Security Protocols.- Durations, Parametric Model-Checking in Timed Automata with Presburger Arithmetic.