Degenerate Stokes Geometry and Some Geometric Structure Underlying a Virtual Turning Point (Algebraic Analysis and the Exact WKB Analysis for Systems of Differential Equations)
Degenerate Stokes Geometry and Some Geometric Structure Underlying a Virtual Turning Point (Algebraic Analysis and the Exact WKB Analysis for Systems of Differential Equations)
复制标题
简并斯托克斯几何和虚拟转折点下的某些几何结构(微分方程组的代数分析和精确 WKB 分析)
DOI:
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发表时间:
2008
期刊:
影响因子:
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通讯作者:
N. Honda
中科院分区:
文献类型:
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作者:
N. Honda
The Stokes geometry associated with a higher order linear differential equation is quite different from that of the second order equation. Ordinary turning points are not enough to describe the complete Stokes geometry, and a new object should appear in the geometry, that is a “virtual turning point” ([BNR], [AKT1]). Although such a point is essential and indispensable for the description of the Stokes geometry, some difficulties are involved. One of the difficulties is that too many virtual turning points appear, and hence the Stokes geometry becomes formidably complicated if we will draw all new Stokes curves, i.e. a Stokes curve emanates from a virtual turning point (see Fig. 1). Fortunately, almost all portions of a new Stokes curve are apparent, in the sense that on such portions Stokes phenomena never occur. To distinguish an apparent portion of a Stokes curve, we draw it by a dotted line instead of a solid one, or even more drastically, we omit a Stokes curve whose entire portion is a dotted line, that makes the Stokes geometry understandable with the naked eye (see Fig. 2). Now the following question naturally arises for the description of the Stokes geometry:
DOI:
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发表时间:
2008
期刊:
RIMS Kokyuroku Bessatsu B5
影响因子:
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作者:
T. Aoki;Y. Kombu;Y. Ohno;T. Aoki and N. Honda;T. Aoki
通讯作者:
T. Aoki
DOI:
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发表时间:
2002
期刊:
Microlocal Analysis and Complex Fourier Analysis
影响因子:
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作者:
T.Aoki
通讯作者:
T.Aoki