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2007
80views more  MST 2007»
13 years 9 months ago
The Power of Commuting with Finite Sets of Words
We construct a finite language L such that the largest language commuting with L is not recursively enumerable. This gives a negative answer to the question raised by Conway in 1...
Michal Kunc
MST
2007
79views more  MST 2007»
13 years 9 months ago
Toward Maximizing the Quality of Results of Dependent Tasks Computed Unreliably
This paper studies the problem of maximizing the number of correct results of dependent tasks computed unreliably. We consider a distributed system composed of a reliable server th...
Li Gao, Grzegorz Malewicz
MST
2007
104views more  MST 2007»
13 years 9 months ago
Randomized Algorithms for 3-SAT
In [Sch99], Sch¨oning proposed a simple yet efficient randomized algorithm for solving the k-SAT problem. In the case of 3-SAT, the algorithm has an expected running time of poly...
Thomas Hofmeister, Uwe Schöning, Rainer Schul...
MST
2007
90views more  MST 2007»
13 years 9 months ago
Optimal Semicomputable Approximations to Reachable and Invariant Sets
In this paper we consider the computation of reachable, viable and invariant sets for discrete-time systems. We use the framework of type-two effectivity, in which computations a...
Pieter Collins