Download PDF by Hee-Kap Ahn, Sang Won Bae, Otfried Cheong (auth.), David: LATIN 2012: Theoretical Informatics: 10th Latin American

By Hee-Kap Ahn, Sang Won Bae, Otfried Cheong (auth.), David Fernández-Baca (eds.)

ISBN-10: 3642293433

ISBN-13: 9783642293436

ISBN-10: 3642293441

ISBN-13: 9783642293443

This ebook constitutes the lawsuits of the tenth Latin American Symposium on Theoretical Informatics, LATIN 2012, held in Arequipa, Peru, in April 2012. The fifty five papers offered during this quantity have been rigorously reviewed and chosen from 153 submissions. The papers tackle numerous issues in theoretical desktop technological know-how with a undeniable specialise in algorithms, automata concept and formal languages, coding conception and information compression, algorithmic graph thought and combinatorics, complexity concept, computational algebra, computational biology, computational geometry, computational quantity thought, cryptography, theoretical features of databases and knowledge retrieval, facts buildings, networks, common sense in machine technology, computer studying, mathematical programming, parallel and allotted computing, trend matching, quantum computing and random structures.

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Extra resources for LATIN 2012: Theoretical Informatics: 10th Latin American Symposium, Arequipa, Peru, April 16-20, 2012. Proceedings

Sample text

An Approximation Algorithm In this section we present a surprisingly simple algorithm that gives an O(n/ε6 )time (1 + ε)-approximation, for any constant ε, 0 < ε < 1. g. [2]). First we solve the MinMax-L∞ problem in linear time (Section 2) and obtain the squares QR and QB covering the red and blue points, √ respectively. Observe that this solution of the MinMax-L∞ problem gives a 2-approximation. g. that QR is larger than QB . For simplicity, √ scale the point set so that QR becomes a 1 × 1 square having circumradius 2/2.

Observe that rp,p can be computed in constant time. Therefore, the smallest feasible radius of CR and CB subject to their anchors, is equal to the maximum of rp,p among all pairs (p, p ) of S. Since we have that H can be found in linear time, there are O(1) combinations of vertices of H to anchor CR and CB , and the smallest feasible radius of CR and CB for each anchor combination can be computed in linear time, then the next result is obtained. Theorem 1. The MinMax-L∞ problem can be solved in optimal time Θ(n).

K ... j k −1 ✲ s s k ✲ s s Fig. 1. Illustration of Transformation A processor p after the same block. We can assume that s ≤ s ≤ t ≤ t according to Proposition 6. Suppose now that we change the schedule using Transformation A. Without considering the tasks, we can see that the gaps become respectively [s + 1, t] for the first processor, and [s − 1, t ] for the processor p or [r, t ] (with r < s ) if there is no other task in the block on processor p. The energy consumed in the first gap decreases by one if t − s ≤ L, and it does not change otherwise.

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LATIN 2012: Theoretical Informatics: 10th Latin American Symposium, Arequipa, Peru, April 16-20, 2012. Proceedings by Hee-Kap Ahn, Sang Won Bae, Otfried Cheong (auth.), David Fernández-Baca (eds.)


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