| Presentation | 2007-05-25 On Approximation of Bookmark Assignments Yuichi ASAHIRO, Eiji MIYANO, Hirotaka ONO, Toshihide MURATA, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Consider a rooted directed acyclic graph G=(V,E)with root r, representing a collection V of web pages connected via a set E of hyperlinks. Each node v is associated with the probability that a user wants to access the node v. The access cost is defined as the expected number of steps required to reach a node from the root r. A bookmark is an additional shortcut from r to a node of G, which may reduce the access cost. The bookmark assignment problem is to find a set of bookmarks that achieves the greatest improvement in the access cost. For the problem, the paper presents a polynomial time approximation algorithm with factor(1-1/e), and shows that there exists no polynomial time approximation algorithm with a better constant factor than(1-1/e)unless NP⫅DTIME(N^ |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | bookmark assignment problem / directed acyclic graph / approximability / inapproximability |
| Paper # | COMP2007-11 |
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| Conference Information | |
| Committee | COMP |
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| Conference Date | 2007/5/18(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Theoretical Foundations of Computing (COMP) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | On Approximation of Bookmark Assignments |
| Sub Title (in English) | |
| Keyword(1) | bookmark assignment problem |
| Keyword(2) | directed acyclic graph |
| Keyword(3) | approximability |
| Keyword(4) | inapproximability |
| 1st Author's Name | Yuichi ASAHIRO |
| 1st Author's Affiliation | Dept of Social Information Systems, Kyushu Sangyo University() |
| 2nd Author's Name | Eiji MIYANO |
| 2nd Author's Affiliation | Dept of Systems Innovation and Informatics, Kyushu Inst of Technology |
| 3rd Author's Name | Hirotaka ONO |
| 3rd Author's Affiliation | Kyushu University, |
| 4th Author's Name | Toshihide MURATA |
| 4th Author's Affiliation | Dept of Systems Innovation and Informatics, Kyushu Inst of Technology |
| Date | 2007-05-25 |
| Paper # | COMP2007-11 |
| Volume (vol) | vol.107 |
| Number (no) | 73 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |