Sciweavers

STACS
2005
Springer
13 years 10 months ago
Deciding Properties of Contract-Signing Protocols
Abstract. We show that for infinite transition systems induced by cryptographic protocols in the Rusinowitch/Turuani style certain fundamental branching properties are decidable. ...
Detlef Kähler, Ralf Küsters, Thomas Wilk...
STACS
2005
Springer
13 years 10 months ago
Cycle Cover with Short Cycles
Cycle covering is a well-studied problem in computer science. In this paper, we develop approximation algorithms for variants of cycle covering problems which bound the size and/o...
Nicole Immorlica, Mohammad Mahdian, Vahab S. Mirro...
STACS
2005
Springer
13 years 10 months ago
Quantum Interactive Proofs with Competing Provers
This paper studies quantum refereed games, which are quantum interactive proof systems with two competing provers: one that tries to convince the verifier to accept and the other...
Gus Gutoski, John Watrous
STACS
2005
Springer
13 years 10 months ago
Fast Pruning of Geometric Spanners
Joachim Gudmundsson, Giri Narasimhan, Michiel H. M...
STACS
2005
Springer
13 years 10 months ago
Pattern Occurrences in Multicomponent Models
Abstract. In this paper we determine some limit distributions of pattern statistics in rational stochastic models, defined by means of nondeterministic weighted finite automata. ...
Massimiliano Goldwurm, Violetta Lonati
STACS
2005
Springer
13 years 10 months ago
Solving Medium-Density Subset Sum Problems in Expected Polynomial Time
The subset sum problem (SSP) (given n numbers and a target bound B, find a subset of the numbers summing to B), is one of the classical NP-hard problems. The hardness of SSP vari...
Abraham Flaxman, Bartosz Przydatek
STACS
2005
Springer
13 years 10 months ago
Recursive Markov Chains, Stochastic Grammars, and Monotone Systems of Nonlinear Equations
We introduce and study Recursive Markov Chains (RMCs), which extend ordinary finite state Markov chains with the ability to invoke other Markov chains in a potentially recursive m...
Kousha Etessami, Mihalis Yannakakis
STACS
2005
Springer
13 years 10 months ago
Sampling Sub-problems of Heterogeneous Max-cut Problems and Approximation Algorithms
Abstract Abstract. Recent work in the analysis of randomized approximation algorithms for NP-hard optimization problems has involved approximating the solution to a problem by the ...
Petros Drineas, Ravi Kannan, Michael W. Mahoney
STACS
2005
Springer
13 years 10 months ago
Roundings Respecting Hard Constraints
We provide a deterministic algorithm that constructs small point sets exhibiting a low star discrepancy. The algorithm is based on recent results on randomized roundings respectin...
Benjamin Doerr