Otfried Cheong, Kyung-Yong Chwa, Kunsoo Park's Algorithms and Computation: 21st International Symposium, PDF

By Otfried Cheong, Kyung-Yong Chwa, Kunsoo Park

ISBN-10: 3642175139

ISBN-13: 9783642175138

This quantity includes the lawsuits of the twenty first Annual overseas S- posium on Algorithms and Computations (ISAAC 2010), held in Jeju, Korea in the course of December 15-17, 2010. prior versions were held in Tokyo, Taipei, Nagoya,HongKong,Beijing,Cairns,Osaka,Singapore,Taejon,Chennai,Taipei, Christchurch, Vancouver, Kyoto, Hong Kong, Hainan, Kolkata, Sendai, Gold Coast, and Hawaii through the years 1990-2009. ISAACis anannualinternationalsymposiumthatcoversthe verywide diversity of issues in algorithms and computation. the most goal of the symposium is to supply a discussion board for researchers operating in algorithms and the speculation of computation the place they could trade principles during this lively learn group. based on the decision for papers, ISAAC 2010 acquired 182 papers. every one submission was once reviewed by means of not less than 3 application Committee contributors with the help of exterior referees. in view that there have been many fine quality papers, this system Committee's job was once tremendous di?cult. via an in depth dialogue, this system Committee authorised seventy seven of the submissions to be p- sented on the convention. precise matters, certainly one of Algorithmica and one of many foreign magazine of Computational Geometry and Applications,were ready with chosen papers from ISAAC 2010. the easiest paper award was once given to "From Holant to #CSP and again: c DichotomyforHolant Problems"byJin-YiCai,SangxiaHuangandPinyanLu, and the easiest pupil paper award to "Satis?ability with Index Dependency" by means of Hongyu Liang and Jing He. eminent invited speakers,David Eppstein from UniversityofCalifornia,Irvine,andMattFranklinfromUniversityofCalifornia, Davis, additionally contributed to this quantity

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Extra resources for Algorithms and Computation: 21st International Symposium, ISAAC 2010, Jeju Island, Korea, December 15-17, 2010, Proceedings, Part II

Example text

Updates with O(1) Amortized Cost. Since our data structure consists of O(log2 B) boundaries Vi , the total cost of an update is O(log2 B). We can reduce the amortized update cost to a constant by storing newly inserted points for all boundaries in one list I and newly deleted points for all boundaries in one list D. An array D stores pointers to elements of D, such that all elements between D[i] and the end of D are removed from the data structure for Vi . An array I stores pointers to elements of I, such that all elements between I[i] and the end of I are new elements that are not yet inserted into the data structure for Vi .

Therefore, the lemma holds. To identify Av [k] for some given node v and position k with d(v) ≤ log n, we construct the structure of Lemma 7 for each node v of ST with 1 < d(v) ≤ log n in a bottom-up fashion to facilitate the identification. It takes O(n log n) bits in total. Then, by Lemma 7, we can determine the position of Av [k] in Ar in O(d(v)) time by backtracking from v to the root r. Since Ar [i] = i for i = 1, 2, . . , n, the value of Aμ(P ) [k] can be found in O(d(v)) time. In summary, given a PPM query (P, s), we first locate μ(P ) in ST .

Our data structure is a modification of the external memory priority search tree [9]. The (external) priority search tree is a tree built on x-coordinates of two-dimensional points. A point stored in a leaf is associated with an ancestor of l or with l itself, so that the following property is guaranteed: points associated with a node v have larger y-coordinates than points associated with descendants of v. The main idea of our modification is to maintain this property for every possible value of the z-coordinate.

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Algorithms and Computation: 21st International Symposium, ISAAC 2010, Jeju Island, Korea, December 15-17, 2010, Proceedings, Part II by Otfried Cheong, Kyung-Yong Chwa, Kunsoo Park

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