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THE POINCARE DENSITY AND THE LIOUVILLE DIFFERENTIAL EQUATION

机译:庞加莱密度和廖维尔微分方程

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摘要

Let u satisfy the Liouville differential equation Δu = 4e~(2u) in a plane domain Ω with the Poincare density P_Ω . Then, either u =φ_Ω or u < φ_Ω in Ω, where φ_Ω = log P_Ω is again a solution. If u < φ_Ω in Ω, then we can show, among others, that u < φ_Ω + Θ_a in Ω{a}, a ∈Ω, where Θ_a < 0 is a reasonable function in Ω. A sharp estimate of the complex partial derivarive u_z near an isolated boundary point of Ω is given. The components of the set L(u) of all points where u attains local minimum are of three kinds: an isolated point, a simple, analytic, open curve ending nowhere in Ω, and an analytic Jordan curve. In particular, if a component γ of L(u) is a Jordan curve, then the bounded domain with γ as its boundary is not contained in Ω. The equation Δu =-4e~(2e) will also be discussed. A number of examples for several purposes are included
机译:令u在Poincare密度P_Ω的平面域Ω中满足Liouville微分方程Δu= 4e〜(2u)。然后,u =φ_Ω或u <φ_Ω(以Ω为单位),其中φ_Ω= logP_Ω再次是一个解决方案。如果u <以Ω为单位的φ_Ω,则除其他外,我们可以证明u <φ_Ω+Ω_a中的Θ_a为a∈Ω,其中Θ_a<0是Ω中的合理函数。给出了一个孤立的Ω边界点附近的复偏导数u_z的精确估计。 u达到局部最小值的所有点的集合L(u)的成分分为三种:孤立点,简单的,解析的,开放的,以Ω结尾的曲线以及解析的Jordan曲线。特别地,如果L(u)的分量γ是约旦曲线,则以γ为边界的有界域不包含在Ω中。也将讨论等式Δu= -4e〜(2e)。包含多个出于多种目的的示例

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