Computer Science - Theory and Applications Fourth International Computer Science Symposium in Russia, CSR 2009, Novosibirsk, Russia, August 18-23, 2009, Proceedings

Invited Papers.- Well-Founded and Partial Stable Semantics Logical Aspects.- The Reachability Problem over Infinite Graphs.- Kolmogorov Complexity and Model Selection.- Automatic Verification of Heap-Manipulating Programs Using Separation Logic.- Accepted Papers.- Canonical Calculi: Invertibility, Axiom Expansion and (Non)-determinism.- Integrality Property in Preemptive Parallel Machine Scheduling.- Characterizing the Existence of Optimal Proof Systems and Complete Sets for Promise Classes.- k-SAT Is No Harder Than Decision-Unique-k-SAT.- Unique Decipherability in the Monoid of Languages: An Application of Rational Relations.- Concurrently Non-malleable Black-Box Zero Knowledge in the Bare Public-Key Model.- Approximability Distance in the Space of H-Colourability Problems.- On Random Ordering Constraints.- Depth Reduction for Circuits with a Single Layer of Modular Counting Gates.- A Feebly Secure Trapdoor Function.- Partitioning Graphs into Connected Parts.- Structural Complexity of AvgBPP.- Lower Bounds for the Determinantal Complexity of Explicit Low Degree Polynomials.- Simulation of Arithmetical Circuits by Branching Programs with Preservation of Constant Width and Syntactic Multilinearity.- One-Nonterminal Conjunctive Grammars over a Unary Alphabet.- Concatenation of Regular Languages and Descriptional Complexity.- Approximability of the Maximum Solution Problem for Certain Families of Algebras.- Complete Complexity Classification of Short Shop Scheduling.- Compressed Word Problems in HNN-Extensions and Amalgamated Products.- Variations on Muchnik’s Conditional Complexity Theorem.- An Optimal Bloom Filter Replacement Based on Matrix Solving.- Aperiodicity Measure for Infinite Sequences.- On the Complexity of Matroid Isomorphism Problems.- Breaking Anonymity by Learning a Unique Minimum Hitting Set.- The Budgeted Unique Coverage Problem and Color-Coding.- Formal Verification of Gate-Level Computer Systems.- On Models of a Nondeterministic Computation.- New Plain-Exponential Time Classes for Graph Homomorphism.- Languages Recognized with Unbounded Error by Quantum Finite Automata.