Structures of graphs on surfaces with complete minors
| Project/Area Number |
21540119
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
General mathematics (including Probability theory/Statistical mathematics)
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| Research Institution | Yokohama National University |
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Principal Investigator |
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| Project Period (FY) |
2009 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2011: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2009: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Keywords | 離散数学 / 位相幾何学的グラフ理論 / グラフ / 曲面 / 三角形分割 / グラフマイナー理論 / 完全グラフ / 偶埋め込み / 奇マイナー / サイクルパリティー / Hadwiger予想 / ハミルトン閉路 / 本型埋め込み |
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| Research Abstract |
This study deals with a problem : A given graph G on a fixed surface, which complete graph Kn does G have as a minor? This problem is difficult in general, and the problem combining this and graph coloring is well-known as Hadwiger's conjecture, one of the important open problems in the literature. In the research, restricting graphs on surfaces to be triangulations, we characterized the graphs on the orientable surface of genus up to 3 and the nonorientable surface of genus up to 4 containing K_6 as a minor. In order to do so, we used the complete list of irreducible triangulations on those surfaces and the theory for graph transformations.
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Report
(4 results)
Research Products
(45 results)
