Sophie Fischer

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In this paper we study an idealized model of load balancing for dynamic spectrum allocation (DSA) for secondary users using only local information. In our model, each agent is assigned to a channel and may reassign its load in a round based fashion. We present a randomized protocol in which the actions of the agents depend purely on some cost measure (e.(More)
We study witness-isomorphic reductions, a type of structure-preserving reduction between NP decision problems. We completely determine the relative power of the diierent models of witness-isomorphic reduction, and we show that witness-isomorphic reductions can be used in a uniform approach to the local search problem.
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