L^1(G//K)中的Wiener Tauberian定理与unit disk中的调和函数
Wiener's Tauberian theorem in L^1(G//K) and harmonic functions in the unit disk
摘要:
我们的主要结果是给出了在$G=SU(1,1)$上的径向可积函数空间$\loneg$中的闭理想$I$上,用傅里叶变换表示的充要条件,使得$I=\loneg$或$I=\lonez$ --积分为零的$\loneg$函数的理想.然后,这是用来证明Furstenberg定理的推广,其特点是调和函数的单位圆盘的平均值属性和“两个圆”Morera型定理(较早宣布的Agranovski \u)。
英文摘要:
Our main result is to give necessary and sufficient conditions, in terms of Fourier transforms, on a closed ideal $I$ in $\loneg$, the space of radial integrable functions on $G=SU(1,1)$, so that $I=\loneg$ or $I=\lonez$---the ideal of $\loneg$ functions whose integral is zero. This is then used to prove a generalization of Furstenberg's theorem which characterizes harmonic functions on the unit disk by a mean value property and a ``two circles" Morera type theorem (earlier announced by Agranovski\uı).
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