| Project/Area Number |
11640035
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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 |
Algebra
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| Research Institution | Saga University |
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Principal Investigator |
ICHIKAWA Takashi Saga University, Faculty of Science and Engineering, Professor, 理工学部, 教授 (20201923)
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| Co-Investigator(Kenkyū-buntansha) |
MITOMA Itaru Saga University, Faculty of Science and Engineering, Professor, 理工学部, 教授 (40112289)
NAKAHARA Toru Saga University, Faculty of Science and Engineering, Professor, 理工学部, 教授 (50039278)
TANAKA Tatsuji Saga University, Faculty of Science and Engineering, Professor, 理工学部, 教授 (80039370)
HIROSE Susumu Saga University, Faculty of Science and Engineering, Lecturer, 理工学部, 講師 (10264144)
UEHARA Tsuyoshi Saga University, Faculty of Science and Engineering, Professor, 理工学部, 教授 (80093970)
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| Project Period (FY) |
1999 – 2000
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| Project Status |
Completed (Fiscal Year 2000)
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| Budget Amount *help |
¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 2000: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1999: ¥1,700,000 (Direct Cost: ¥1,700,000)
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| Keywords | Teichmueller groupoid / Moduli space / Riemann surface / Algebraic curve / Uniformization / Galois representation / Monodromy representation / Mapping class group / ガロア作用 / チャーン・サイモンズ積分 / 代数幾何符号 |
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| Research Abstract |
1. Teichmueller groupoids are fundamental groupoids of the moduli space of pointed Riemann surfaces, and are studied in topology and mathematical physics. Using the arithmetic Schottky-Mumford uniformization theory on algebraic curves given by the head investigator, we constructed Teichmueller groupoids in the category of arithmetic geometry.
2. Using the result in 1, we verified Grothendieck's conjecture on motives attached to Teichmueller groupoids for Galois representations and monodromy representations given by conformal field theory, i.e. showed that these objects are generated by basic ones.
3. We described explicitly the Chow-forms of elliptic normal curves of degree 4, and showed that certain projective algebraic varieties admit Chow-forms having a special property.
4. We studied unit groups, class numbers and integer rings for some abelian number fields.
5. We discussed the infinite level asymptotics of the perturbative Chern-Simons integral without renormalization, by introducing a Gaussian kernel increasing along the level tends to infinity.
6. We determined the minimum distances of evaluation codes of the Hermite type, and constructed the bases of a part of trace-norm codes.
7. Using complex of curves, we obtained Gervais' symmetric presentation for the mapping class group of a surface. Furthermore, we determined the virtual cohomological dimension and the Euler number of the mapping class group of a 3-dimensional handlebody.
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