existence of radial limits of harmonic functions in banach spaces

Citation:

Bu Shangquan(步尚全).existence of radial limits of harmonic functions in banach spaces[J].Chinese Annals of Mathematics B,1992,13(1):110~118
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Authors:

Bu Shangquan(步尚全);
Abstract: The following result is established: let X be a Banach space without the Radon-Nikodym property, there exists a uniformly bounded harmonic function f defined on the open unit disk of C with values in X, such that for almost all $\theta \in[0,2\pi]$, $lim f(re^{i\theta}),r\rightarrow t$ does not exist.

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