| Project/Area Number |
11640203
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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 |
Global analysis
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| Research Institution | HIROSHIMA UNIVERSITY |
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Principal Investigator |
YOSHIDA Kiyoshi Hiroshima Univ., Integrated Arts and Sciences, Prof., 総合科学部, 教授 (80033893)
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| Co-Investigator(Kenkyū-buntansha) |
TANAKA Kazunaga Waseda Univ., Science and Engineering, Prof., 理工学部, 教授 (20188288)
MIZUTA Yoshihiro Hiroshima Univ., Integrated Arts and Sciences, Prof., 総合科学部, 教授 (00093815)
NAGAI Toshitaka Hiroshima Univ., Graduate Scholl of Science, Prof., 大学院・理学研究科, 教授 (40112172)
NAITO Yuki Kobe Univ., Engineering, Ass.Prof., 工学部, 助教授 (10231458)
USAMI Hiroyuki Hiroshima Univ., Integrated Arts and Sciences, Ass.Prof., 総合科学部, 助教授 (90192509)
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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: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1999: ¥1,600,000 (Direct Cost: ¥1,600,000)
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| Keywords | Keller-Segel system / Self-similar solution / global blanch / locations of blow up points / chemotactic collapse / elliptic equation / oscllation problem / Sobolev functions / 楕円型方程式 / 爆発 / 大域解 / 固有値問題 / 双曲型方程式 |
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| Research Abstract |
T.Nagi, Y.Naito and K.Yoshida studied the Keller-Segel system which is the mathematical model describing chemotactic aggregation of cellular slime molds which move toward high cocentrations of chemical substance. Naito and Yoshida with N.Muramoto studied the self-similar solution to the Keller-Segel system. Then the Keller-Segel system is reduced to an elliptic equation with an parameter σ, and obtained solutions of two types, one of which is in a low critical lebel, the other is in a high cirtical lebel. When the parameter is large, there is no self-similar radial solution. This means two solutions are connected by a global blanch. Nagai with T.Senba and T.Suzuki considered the location of blow-up points. These results are announced at each conference or workshop e.g, IMS Workshop on Reaction-Diffusion Systems at HongKong (December 6-10, 1999), The Third World Congress of Nonlinear Analysis at Catania (July 19-26, 2000). H.Usami treated the oscillation problem to the second order ordinary differential equations and the asymptotic properties of the variational eigenvalues. Y.Mizuta completed the results by Koskela concerning the uniqueness property for Sobolev functions.
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