This paper surveys results concerning peak sets and boundary interpolation sets for the unit disc. It includes hitherto unpublished results proved by Ullrich on peak sets for the Zygmund class.

中文翻译：

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单位圆盘的峰集和边界插值集：调查

本文调查了有关单位圆盘的峰集和边界插值集的结果。它包括迄今为止尚未发表的结果，这些结果由Ullrich在Zygmund类的峰集上证明。