| Project/Area Number |
23740126
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Global analysis
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| Research Institution | Nihon University |
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Principal Investigator |
MADA Jun 日本大学, 生産工学部, 助教 (80396853)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2011: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Keywords | 可積分系 / セルオートマトン / 有限体 / 相関関数 / 箱玉系 / 超離散化 / 超離散 / 量子化 |
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| Research Abstract |
I investigated (1) discrete integrable equations over finite fields and (2) a classification of an elementary cellular automaton.
(1) (i) Replacing a parameter with a value in finite fields, one can uniquely determine the values of the dependent variables in finite fields and infinity. Thanks to this property, I obtained the time evolution and N soliton solutions of the (generalized) discrete KdV equations over finite fields. (ii) I defined the notion of almost good reduction (AGR), which is an arithmetic analogue of passing the singularity confinement test, and proved that the discrete Painleve II equation (dPII) has AGR. By AGR, I obtained the time evolution and a solution of the dPII over finite fields. I had the similar results for qPII, qPIII, qPIV and dKdV.
(2) I suggested a classification of an elementary cellular automaton by singular value decomposition. Though class 4 resembles class 3 of Wolfram's classification, one can distinguish them by using the above method.
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