| Project/Area Number |
14204012
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Global analysis
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| Research Institution | the University of Tokyo |
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Principal Investigator |
OKAMOTO Kazuo the University of Tokyo, Graduate School of Mathematical Sciences, Professor (40011720)
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| Co-Investigator(Kenkyū-buntansha) |
KATSURA Toshiyuki Univ.of Tokyo, Graduate School of Mathematical Sciences, 大学院・数理科学研究科, Prof. (40108444)
JIMBO Michio Univ.of Tokyo, Graduate School of Mathematical Sciences, Prof. (80109082)
SAKAI Hidetaka Univ.of Tokyo, Graduate School of Mathematical Sciences, Assoc., Prof. (50323465)
SATSUMA Junkichi Aoyama Gakuin Univ., College of Science and Engineering, 理工学部, Prof. (70093242)
NOUMI Masatoshi Kobe Univ., Graduate School of Science and Technology, Prof. (80164672)
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| Project Period (FY) |
2002 – 2005
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| Project Status |
Completed (Fiscal Year 2005)
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| Budget Amount *help |
¥48,490,000 (Direct Cost: ¥37,300,000、Indirect Cost: ¥11,190,000)
Fiscal Year 2005: ¥11,050,000 (Direct Cost: ¥8,500,000、Indirect Cost: ¥2,550,000)
Fiscal Year 2004: ¥11,570,000 (Direct Cost: ¥8,900,000、Indirect Cost: ¥2,670,000)
Fiscal Year 2003: ¥11,050,000 (Direct Cost: ¥8,500,000、Indirect Cost: ¥2,550,000)
Fiscal Year 2002: ¥14,820,000 (Direct Cost: ¥11,400,000、Indirect Cost: ¥3,420,000)
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| Keywords | Painleve equations / Garnier systems / nonlinear integrable systems / bilinear forms / symmetries / τ-functions / space of initial conditions / discrete systems / 非線型可積分系 / バンルヴェ方程式 / 可積分系 / ベックルント変換 / 折り畳み変換 / ホロノミック変形 / ルート系 / 双有理正準変換 |
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| Research Abstract |
The aim of present project is to study in synthetic manner the Painleve equations and the Garnier systems from many different points of view ; the latter is a generalization in the case of several variables of the former. In other words, we pursue studies on the Painleve equations with analytic, geometric and algebraic method and magnify, based on results obtained concerning Painleve equations, our research to investigation on general integrable systems, such as the Ganier system, discrete and q-difference Painleve equations. As for analytic behavior of solutions of Painleve equations, we have obtained new results by using Nevanlinna theory on meromorphic functions. The space of initial conditions of Painleve equations was constructed by K. OKAMOTO ; recently an analogous object has been considered for the Garnier systems and this gives us a geometric aspect on studies of the Garnier systems. From an algebraic view point of nonlinear integrable systems, we have studied birational canonical transformations of the Garnier systems by exteoding results on those of Painleve equations.
At the beginning of pursuit of present project, we studied algebraic transformation of Painleve equations, called folding transformations of the space of initial conditions, we have arrived at the final result, which are published in the first articles cited in the list of publications. By means of geometrical researches on Painleve equations, done by H.SAKAI, the third Painleve equations has two special degenerate types and it is natural to consider the eight types of Painleve equations from a geometric point of view. We have completed studies on Painleve equations by considering the Hamiltonian structure of these two types of equations ; the space of initial conditions, the group of birational canonical transformations and special solutions are given in the second article of the list of the next page.
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