Sur l’existence d’une solution ramifiée pour des équations de Fuchs à caractéristique simple
Sur l’existence d’une solution ramifiée pour des équations de Fuchs à caractéristique simple
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关于 Fuchs 的简单方程的存在解决方案
DOI:
10.1090/s0002-9939-09-09803-7
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发表时间:
2009
影响因子:
0.7
通讯作者:
Murilo Santos de Lima
中科院分区:
文献类型:
--
作者:
Murilo Santos de Lima
The aim of this paper is to construct a holomorphic solution, ramified around a simple characteristic hypersurface, for some linear Fuchsian equation of order m > 1. We consider an operator L, holomorphic in a neighborhood of the origin in ℂ t x ℂ n x , of the form L = tA + B where A and B are linear partial differential operators of order m and m ― 1, and where A has a simple characteristic hypersurface transverse to S: t = 0. Under an assumption linking the principal symbols of A and B, the question is reduced to the study of an integro-differential Fuchsian equation with an additional variable z that describes the universal covering of a pointed disk. It is an equation where terms like t l D h t D α x (tD t + 1) ―1 D ―q z , l, h, q ∈ ℕ, α ∈ ℕ n with l ≤ 1 and h + |α| < l + q appear. The problem is solved by the fixed-point theorem with appropriate estimations in a Banach space.