| Project/Area Number |
12640164
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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 | Fukui University |
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Principal Investigator |
SHIMOMURA Hiroaki Fukui University Faculty of Enginnering, Professor, 工学部, 教授 (20092827)
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| Co-Investigator(Kenkyū-buntansha) |
YASUKURA Osami Fukui University Faculty of Enginnering, Associate Professor, 工学部, 助教授 (00191122)
ONODA Nobuharu Fukui University Faculty of Enginnering, Professor, 工学部, 教授 (40169347)
MIKAMI Shunsuke Fukui Medical University, Factory of Medicine, Professor, 医学部, 教授 (00126640)
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| Project Period (FY) |
2000 – 2001
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| Project Status |
Completed (Fiscal Year 2001)
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| Budget Amount *help |
¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 2001: ¥400,000 (Direct Cost: ¥400,000)
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| Keywords | Manifold / Difisomorphism / Quasi-Invariant Measure / Unitary Representation / Smooth Vector / Inductive Limit / 直積構造 / 準不変測度 / 滑らかなベクトル / Diffeomorphism Group / Unitary Representation / Quasi-Invariant Measure / Smooth Vector / Regular Representation |
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| Research Abstract |
In 2000 the following results are obtained : 1. Let M be a smooth compact manifold and Diff^k (M) be the group of all C^k diffeomorphisins on M. Then there exists a probability measure μ on Diff^k (M) that is quasi-invariant under the left action of the smooth diffeomorphisms.2. Every continuous unitary representation of the group of smooth diffeoinorphisros on M has a dense setof the smooth vectors under a natural hypothesis.3. The above result is naturally extended to non compact M.
Subsequently during the period of 2001 we considered direct questions of the above results and related topics, for example : 1. Irreducibility of the natural representation derived from the measure μ. 2. Ergodicity of μ itself.
Unfortunately we have neither definite conclusions for these questions up to now nor nice applications to current algebra appeared in the second quantization in quantum mechanics.
On the other hand our considerations to inductive limit of topological groups are fairly developed in this period. We are now arguing inductive limit of topological spaces, their direct products and problems related algebraic structures. Several results are obtained till now (See [T. Hirai et al. ]).
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