STACS 99

Invited Talks.- Algorithms for Selfish Agents.- The Reduced Genus of a Multigraph.- Classifying Discrete Temporal Properties.- Complexity 1.- Circuit Complexity of Testing Square-Free Numbers.- Relating Branching Program Size and Formula Size over the Full Binary Basis.- Theory of Parallel Algorithms 1.- Memory Organization Schemes for Large Shared Data: A Randomized Solution for Distributed Memory Machines.- The Average Time Complexity to Compute Prefix Functions in Processor Networks.- Complexity 2.- On the Hardness of Permanent.- One-Sided Versus Two-Sided Error in Probabilistic Computation.- Computational Geometry.- An Optimal Competitive Strategy for Walking in Streets.- An Optimal Strategy for Searching in Unknown Streets.- Parallel Searching on m Rays.- Complexity 3.- A Logical Characterisation of Linear Time on Nondeterministic Turing Machines.- Descriptive Complexity of Computable Sequences.- Complexity of Some Problems in Universal Algebra.- Algorithms and Data Structures 1.- New Branchwidth Territories.- Balanced Randomized Tree Splitting with Applications to Evolutionary Tree Constructions.- Treewidth and Minimum Fill-In of Weakly Triangulated Graphs.- Automata and Formal Languages.- Decidability and Undecidability of Marked PCP.- On Quadratic Word Equations.- Some Undecidability Results Related to the Star Problem in Trace Monoids.- Algorithms and Data Structures 2.- An Approximation Algorithm for Max p-Section.- Approximating Bandwidth by Mixing Layouts of Interval Graphs.- Linear Time 1/2-Approximation Algorithm for Maximum Weighted Matching in General Graphs.- Complexity 4.- Extending Downward Collapse from 1-versus-2 Queries to j-versus-j + 1 Queries.- Sparse Sets, Approximable Sets, and Parallel Queries to NP.- Algorithms and Data Structures 3.- External Selection.- Fast Computations of the Exponential Function.- Verification.- A Model of Behaviour Abstraction for Communicating Processes.- Model Checking Lossy Vector Addition Systems.- Algorithms and Data Structures 4.- Constructing Light Spanning Trees with Small Routing Cost.- Finding Paths with the Right Cost.- Complexity 5.- In How Many Steps the k Peg Version of the Towers of Hanoi Game Can Be Solved?.- Lower Bounds for Dynamic Algebraic Problems.- An Explicit Lower Bound for TSP with Distances One and Two.- Theory of Parallel Algorithms 2.- Scheduling Dynamic Graphs.- Supporting Increment and Decrement Operations in Balancing Networks.- Worst-Case Equilibria.- Algorithmic Learning.- A Complete and Tight Average-Case Analysis of Learning Monomials.- Costs of General Purpose Learning.- Universal Distributions and Time-Bounded Kolmogorov Complexity.- Logic in Computer Science.- The Descriptive Complexity Approach to LOGCFL.- The Weakness of Self-Complementation.- On the Difference of Horn Theories.- Complexity 6.- On Quantum Algorithms for Noncommutative Hidden Subgroups.- On the Size of Randomized OBDDs and Read-Once Branching Programs for k-Stable Functions.- How To Forget a Secret.- Logic in Computer Science 2.- A Modal Fixpoint Logic with Chop.- Completeness of Neighbourhood Logic.- Eliminating Recursion in the ?-Calculus.- Complexity 7.- On Optimal Algorithms and Optimal Proof Systems.- Space Bounds for Resolution.- Algorithms and Data Structures 5.- Upper Bounds for Vertex Cover Further Improved.- Online Matching for Scheduling Problems.