By Alok Aggarwal, C. Pandu Rangan

ISBN-10: 3540466320

ISBN-13: 9783540466321

ISBN-10: 3540669167

ISBN-13: 9783540669166

This booklet constitutes the refereed lawsuits of the tenth overseas Symposium on Algorithms and Computation, ISAAC'99, held in Chennai, India, in December 1999.
The forty revised complete papers provided including 4 invited contributions have been conscientiously reviewed and chosen from seventy one submissions. one of the themes lined are info constructions, parallel and disbursed computing, approximation algorithms, computational intelligence, on-line algorithms, complexity concept, graph algorithms, computational geometry, and algorithms in perform.

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Extra resources for Algorithms and Computation: 10th International Symposium, ISAAC’99 Chennai, India, December 16–18, 1999 Proceedings

Example text

There are P PEs numbered 0 through P −1. 1 Arithmetics on numbers of word length – including random number generation – is assumed to require constant time. All messages delivered to a PE are first put into a single FIFO message queue. In the full LogP model, three parameters for “latency” L, “overhead” o and “gap” g contribute to the cost of message transfer. We make the more conservative assumption that sending and receiving messages always costs Trout := L + o + g units of time. So the analysis also applies to the widespread messaging protocols that block until a message has been copied into the message queue of the recipient.

Previous work did not prove efficiency close to one and used less accurate models. In particular, our machine model allows asynchronous communication with nonconstant message delays and does not assume that communication takes place in rounds. This model is compatible with the LogP model. 1 Introduction Many algorithms in operations research and artificial intelligence are based on the backtracking principle for traversing large irregularly shaped trees that are only defined implicitly by the computation [3,4,6,9,12,13,14,19,17,21,35].

Hence the best is to delete one thread immediately if w ≥ 1 and to simply continue if w < 1. This is exactly what BRIDGES does, so optimality follows. A more formal proof would use induction on the number of steps. ✷ Next we present two straightforward but different generalizations of the 2competitive deterministic solution to the rent-to-buy problem. The first one is: 30 P. Damaschke EXPIRY DATE STACK Maintain a stack of threads. (1) When a thread becomes idle at time t, assign expiry date t + 1 to it, and add it to the stack.

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Algorithms and Computation: 10th International Symposium, ISAAC’99 Chennai, India, December 16–18, 1999 Proceedings by Alok Aggarwal, C. Pandu Rangan


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