| Presentation | 2005-07-13 An Algorithm for Generating Radial Trees Yoshiyuki KUSAKARI, Yoshimi NIISATO, Junichi NOTOYA, Masao KASAI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Recently, some algorithms have been developed for generating instances of difficult problems, such as NP-hard or PSPACE-hard. Alt et.al. have showed that the decision problem for flattening the tree linkage, that is, whether the tree linkage could be flattened or not without crossing any two bars [2]. For such problem, the "radial tree" is considered [9]. In this paper, we give an algorithm for generating a radial tree T, in time O(n log n) using space O(n) if T has n joints. Our algorithm is a plane sweep type algorithm using a circle instead of a line. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | instance generation / PSPACE-hard / NP-hard / linkage / flattening / monotone tree / radial tree |
| Paper # | DE2005-40 |
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| Conference Information | |
| Committee | DE |
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| Conference Date | 2005/7/6(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Data Engineering (DE) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | An Algorithm for Generating Radial Trees |
| Sub Title (in English) | |
| Keyword(1) | instance generation |
| Keyword(2) | PSPACE-hard |
| Keyword(3) | NP-hard |
| Keyword(4) | linkage |
| Keyword(5) | flattening |
| Keyword(6) | monotone tree |
| Keyword(7) | radial tree |
| 1st Author's Name | Yoshiyuki KUSAKARI |
| 1st Author's Affiliation | Department of Electronics and Information Systems, Faculty of Systems Science and Thechnology, Akita Prefectural University() |
| 2nd Author's Name | Yoshimi NIISATO |
| 2nd Author's Affiliation | Department of Electronics and Information Systems, Graduate School of Systems Science and Thechnology, Akita Prefectural University |
| 3rd Author's Name | Junichi NOTOYA |
| 3rd Author's Affiliation | Department of Electronics and Information Systems, Faculty of Systems Science and Thechnology, Akita Prefectural University |
| 4th Author's Name | Masao KASAI |
| 4th Author's Affiliation | Department of Electronics and Information Systems, Faculty of Systems Science and Thechnology, Akita Prefectural University |
| Date | 2005-07-13 |
| Paper # | DE2005-40 |
| Volume (vol) | vol.105 |
| Number (no) | 171 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |