| Project/Area Number |
23654029
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
General mathematics (including Probability theory/Statistical mathematics)
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| Research Institution | Yamagata University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
KITAZUME Masaaki 千葉大学, 大学院・理学研究科, 教授 (60204898)
SHIMAKURA Hiroki 東北大学, 大学院・情報科学研究科, 准教授 (90399791)
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| Project Period (FY) |
2011 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2012: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| Keywords | 自己双対符号 / 格子 / 組合せデザイン |
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| Research Abstract |
In this research proect, I tried to construction of an extremal doubly even self-dual code of length 72. The existence of such a code is a famous problem in algebraic coding theory. In this process, a 72-dimensional optimal odd unimodular lattice was constructed for the first time. Also, it was shown that there is an extremal Type II _<2k>-code of length 72 for an integer satisfying that is even and is greater than or equal to 4.
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