| Project/Area Number |
11640161
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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 |
Basic analysis
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| Research Institution | Gifu University |
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Principal Investigator |
MURO Masakazu Gifu University, Faculty of Engineerings, Professor, 工学部, 教授 (70127934)
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| Co-Investigator(Kenkyū-buntansha) |
KOBAYASHI Takako Gifu University, Faculty of Engineerings, Associate Professor, 工学部, 助教授 (40252126)
AMANO Kazuo Gifu University, Faculty of Engineerings, Professor, 工学部, 教授 (40021761)
SHIGA Kiyoshi Gifu University, Faculty of Engineerings, Professor, 工学部, 教授 (10022683)
MANDAI Takeshi Osaka Electronic Communication University, Faculty of Engineerings, Professor, 工学部, 教授 (10181843)
ASAKAWA Hidekazu Gifu University, Faculty of Engineerings, Research Assistant, 工学部, 助手 (00211003)
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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 |
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2000: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1999: ¥1,800,000 (Direct Cost: ¥1,800,000)
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| Keywords | Representation / Prehomogeneous / Differential equation / Number theory / Zeta function / Vector space / Group / Invarinat algebra / Differential Operators / 超局所解析 / 線型微分作用素 / グレブナ基底 / リー群の表現 |
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| Research Abstract |
(a) (From the abstract of the paper "Hyperfunction solutions of invariant differential equations on the space of real symmetric matrices".) The real special linear group of degree n naturally acts on the vector space of n×n real symmtric matrices. How to determine invariant hyperfunction solutions of invariant linear differential equations with polynomial coefficients on the vector space of n×n real symmtric matrices is discussed in this paper. We observe that every invariant hyperfunction solution is expressed as a linear combination of Laurent expansion coefficients of the complex power of the determinant function with respect to the parameter of the power. Then the problem is reduced to the determination of Laurent expansion coefficients which is needed to express. We give an algorithm to determine them and apply the algorithm in some examples.
(b) (From the abstract of the paper "An algorithm th compute the b_P-functions via Grobner bases of invariant differential operators on prehomogeneous vector spaces".) The calculation of b_P-function via Grobner basis for an group invariant differential operator P (x, ∂) on a finite dimensional vector space is considered in this paper. Let (G, V) be a regular prehomogeneous vector space. It is often observed that the space of all G-invariant hyperfunction solutions u (x) to the differential equation P (x, ∂) u (x)=v (x) is determined by its b_P-function, a polynomial associated with the G-invariant differential operator P (x, ∂). We prove in this paper that the b_P-function is computed by an algorithm using Grobner basis of the Weyl algebra on V for a typical class of prehomogeneous vector spaces.
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