2015 Fiscal Year Final Research Report
The study on perturbation problem for the nonliner elliptic partial differential equation by variational method
Project/Area Number |
23740124
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Multi-year Fund |
Research Field |
Global analysis
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Research Institution | Saitama University (2013-2015) Osaka City University (2011-2012) |
Principal Investigator |
SATO Yohei 埼玉大学, 理工学研究科, 准教授 (00465387)
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Project Period (FY) |
2011-04-28 – 2016-03-31
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Keywords | 変分法 / 摂動法 / 非線形楕円型偏微分方程式 |
Outline of Final Research Achievements |
This research is concerned with perturbation problem for the nonlinear elliptic partial differential systems with variational structure. I showed the multiple existence of semi-positive solutions for the nonlinear Schrodinger systems which consists of two equations. I also showed the existence of semi-solutions for the nonlinear Schrodinger systems which consists of n equations. That semi-positive solution changes sign exactly once for any chosen components and that is positive for the other components. Moreover, I also studied the nonlinear Schrodinger systems which consists of three equations. In particular, I consider the case where the coefficient of two coupling terms are negative and the coefficient of one coupling term is positive. Then I showed existence of a least energy positive solution and the shape of the solution. Moreover, I showed the multiple existence of positive solutions.
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Free Research Field |
偏微分方程式
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