Computing and Combinatorics: 5th Annual International by Jon M. Kleinberg, Ravi Kumar, Prabhakar Raghavan, Sridhar

By Jon M. Kleinberg, Ravi Kumar, Prabhakar Raghavan, Sridhar Rajagopalan (auth.), Takano Asano, Hideki Imai, D. T. Lee, Shin-ichi Nakano, Takeshi Tokuyama (eds.)

The abstracts and papers during this quantity have been provided on the 5th Annual foreign Computing and Combinatorics convention (COCOON ’99), which used to be held in Tokyo, Japan from July 26 to twenty-eight, 1999. the themes disguise so much elements of theoretical desktop technological know-how and combinatorics bearing on computing. in line with the decision for papers, 88 top quality prolonged abstracts have been submitted the world over, of which forty six have been chosen for presentation by way of the p- gram committee. each submitted paper was once reviewed via no less than 3 software committee individuals. lots of those papers signify reviews on carrying on with - seek, and it really is anticipated that the majority of them will look in a extra polished and entire shape in scienti c journals. as well as the commonplace papers, this v- ume includes abstracts of 2 invited plenary talks by means of Prabhakar Raghavan and Seinosuke Toda. The convention additionally incorporated a distinct speak via Kurt Mehlhorn on LEDA (Library of E cient facts kinds and Algorithms). The Hao Wang Award (inaugurated at COCOON ’97) is given to honor the paper judged through this system committee to have the best scienti c advantage. The recipients of the Hao Wang Award 1999 have been Hiroshi Nagamochi and Tos- disguise Ibaraki for his or her paper \An Approximation for locating a Smallest 2-Edge- attached Subgraph Containing a Speci ed Spanning Tree".

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Extra info for Computing and Combinatorics: 5th Annual International Conference, COCOON’99 Tokyo, Japan, July 26–28, 1999 Proceedings

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Hereafter for a while, we will discuss about the existence of a k-fat tissue for all components of G with separation-width at most k. V ∗ Definition 5. Let G = (V, E) be a graph and let Xj m j=0 be a sequence in (2 ) . Then, we say that Xj is a k-fat substance of G if and only if it satisfies the conditions (0), (2), and (3) of being a k-fat tissue and satisfies the following condition (1 ) instead of (1): (1 ) For all p(0 ≤ p < m) and all nodes w ∈ NG (Xp ), SIDEk (G−E[ holds. m j=0 Xj ], w) Only the difference from the condition (1) of being a k-fat tissue is that the last set Xm in the sequence may not satisfy the conditions on SIDEk .

Shmueli. Information gathering on the World Wide Web: the W3QL query language and the W3QS system. Trans. on Database Systems, 1998. 23. S. R. Kumar, P. Raghavan, S. Rajagopalan and A. Tomkins. Trawling emerging cyber-communities automatically. Proc. , 1999. 24. L. V. S. Lakshmanan, F. Sadri, and I. N. Subramanian. A declarative approach to querying and restructuring the World Wide Web. Post-ICDE Workshop on RIDE, 1996. 25. R. Larson. Bibliometrics of the World Wide Web: An exploratory analysis of the intellectual structure of cyberspace.

By |W | = |LEAF (v)| − 2|M | and |M | ≤ |M ∗ |, it holds |E | ≥ |M |+ 23 |W | = 23 |LEAF (v)|− 13 |M | ≥ 23 |LEAF (v)|− 1 ∗ 3 |M |. 1 Approximation Algorithm Outline Based on the lower bounds in the previous section, we design an approximation algorithm for 2-ECST. The main idea of the algorithm is as follows. We first find a subtree T [D(v)] satisfying the following conditions (i) and (ii), where Elf denotes the set of edges in E which are incident to a leaf or fringe vertex in T [D(v)]: (i) every edge in Elf has its end vertices both in T [D(v)], and (ii) Elf covers all edges in T [D(v)].

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